sentence1 stringlengths 52 3.87M | sentence2 stringlengths 1 47.2k | label stringclasses 1
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def _value_ref(self, column, value, *, dumped=False, inner=False):
"""inner=True uses column.typedef.inner_type instead of column.typedef"""
ref = ":v{}".format(self.next_index)
# Need to dump this value
if not dumped:
typedef = column.typedef
for segment in path... | inner=True uses column.typedef.inner_type instead of column.typedef | entailment |
def any_ref(self, *, column, value=missing, dumped=False, inner=False):
"""Returns a NamedTuple of (name, type, value) for any type of reference.
.. code-block:: python
# Name ref
>>> tracker.any_ref(column=User.email)
Reference(name='email', type='name', value=None... | Returns a NamedTuple of (name, type, value) for any type of reference.
.. code-block:: python
# Name ref
>>> tracker.any_ref(column=User.email)
Reference(name='email', type='name', value=None)
# Value ref
>>> tracker.any_ref(column=User.email, value... | entailment |
def pop_refs(self, *refs):
"""Decrement the usage of each ref by 1.
If this was the last use of a ref, remove it from attr_names or attr_values.
"""
for ref in refs:
name = ref.name
count = self.counts[name]
# Not tracking this ref
if coun... | Decrement the usage of each ref by 1.
If this was the last use of a ref, remove it from attr_names or attr_values. | entailment |
def render(self, obj=None, condition=None, atomic=False, update=False, filter=None, projection=None, key=None):
"""Main entry point for rendering multiple expressions. All parameters are optional, except obj when
atomic or update are True.
:param obj: *(Optional)* An object to render an atomic... | Main entry point for rendering multiple expressions. All parameters are optional, except obj when
atomic or update are True.
:param obj: *(Optional)* An object to render an atomic condition or update expression for. Required if
update or atomic are true. Default is False.
:param ... | entailment |
def rendered(self):
"""The rendered wire format for all conditions that have been rendered. Rendered conditions are never
cleared. A new :class:`~bloop.conditions.ConditionRenderer` should be used for each operation."""
expressions = {k: v for (k, v) in self.expressions.items() if v is not Non... | The rendered wire format for all conditions that have been rendered. Rendered conditions are never
cleared. A new :class:`~bloop.conditions.ConditionRenderer` should be used for each operation. | entailment |
def _unpack(self, record, key, expected):
"""Replaces the attr dict at the given key with an instance of a Model"""
attrs = record.get(key)
if attrs is None:
return
obj = unpack_from_dynamodb(
attrs=attrs,
expected=expected,
model=self.mode... | Replaces the attr dict at the given key with an instance of a Model | entailment |
def reformat_record(record):
"""Repack a record into a cleaner structure for consumption."""
return {
"key": record["dynamodb"].get("Keys", None),
"new": record["dynamodb"].get("NewImage", None),
"old": record["dynamodb"].get("OldImage", None),
"meta": {
"created_at"... | Repack a record into a cleaner structure for consumption. | entailment |
def unpack_shards(shards, stream_arn, session):
"""List[Dict] -> Dict[shard_id, Shard].
Each Shards' parent/children are hooked up with the other Shards in the list.
"""
if not shards:
return {}
# When unpacking tokens, shard id key is "shard_id"
# When unpacking DescribeStream respons... | List[Dict] -> Dict[shard_id, Shard].
Each Shards' parent/children are hooked up with the other Shards in the list. | entailment |
def token(self):
"""JSON-serializable representation of the current Shard state.
The token is enough to rebuild the Shard as part of rebuilding a Stream.
:returns: Shard state as a json-friendly dict
:rtype: dict
"""
if self.iterator_type in RELATIVE_ITERATORS:
... | JSON-serializable representation of the current Shard state.
The token is enough to rebuild the Shard as part of rebuilding a Stream.
:returns: Shard state as a json-friendly dict
:rtype: dict | entailment |
def walk_tree(self):
"""Generator that yields each :class:`~bloop.stream.shard.Shard` by walking the shard's children in order."""
shards = collections.deque([self])
while shards:
shard = shards.popleft()
yield shard
shards.extend(shard.children) | Generator that yields each :class:`~bloop.stream.shard.Shard` by walking the shard's children in order. | entailment |
def jump_to(self, *, iterator_type, sequence_number=None):
"""Move to a new position in the shard using the standard parameters to GetShardIterator.
:param str iterator_type: "trim_horizon", "at_sequence", "after_sequence", "latest"
:param str sequence_number: *(Optional)* Sequence number to us... | Move to a new position in the shard using the standard parameters to GetShardIterator.
:param str iterator_type: "trim_horizon", "at_sequence", "after_sequence", "latest"
:param str sequence_number: *(Optional)* Sequence number to use with at/after sequence. Default is None. | entailment |
def seek_to(self, position):
"""Move the Shard's iterator to the earliest record after the :class:`~datetime.datetime` time.
Returns the first records at or past ``position``. If the list is empty,
the seek failed to find records, either because the Shard is exhausted or it
reached the... | Move the Shard's iterator to the earliest record after the :class:`~datetime.datetime` time.
Returns the first records at or past ``position``. If the list is empty,
the seek failed to find records, either because the Shard is exhausted or it
reached the HEAD of an open Shard.
:param ... | entailment |
def load_children(self):
"""If the Shard doesn't have any children, tries to find some from DescribeStream.
If the Shard is open this won't find any children, so an empty response doesn't
mean the Shard will **never** have children.
"""
# Child count is fixed the first time any ... | If the Shard doesn't have any children, tries to find some from DescribeStream.
If the Shard is open this won't find any children, so an empty response doesn't
mean the Shard will **never** have children. | entailment |
def get_records(self):
"""Get the next set of records in this shard. An empty list doesn't guarantee the shard is exhausted.
:returns: A list of reformatted records. May be empty.
"""
# Won't be able to find new records.
if self.exhausted:
return []
# Alre... | Get the next set of records in this shard. An empty list doesn't guarantee the shard is exhausted.
:returns: A list of reformatted records. May be empty. | entailment |
def bind(self, model, *, skip_table_setup=False):
"""Create backing tables for a model and its non-abstract subclasses.
:param model: Base model to bind. Can be abstract.
:param skip_table_setup: Don't create or verify the table in DynamoDB. Default is False.
:raises bloop.exceptions.... | Create backing tables for a model and its non-abstract subclasses.
:param model: Base model to bind. Can be abstract.
:param skip_table_setup: Don't create or verify the table in DynamoDB. Default is False.
:raises bloop.exceptions.InvalidModel: if ``model`` is not a subclass of :class:`~bloo... | entailment |
def delete(self, *objs, condition=None, atomic=False):
"""Delete one or more objects.
:param objs: objects to delete.
:param condition: only perform each delete if this condition holds.
:param bool atomic: only perform each delete if the local and DynamoDB versions of the object match.
... | Delete one or more objects.
:param objs: objects to delete.
:param condition: only perform each delete if this condition holds.
:param bool atomic: only perform each delete if the local and DynamoDB versions of the object match.
:raises bloop.exceptions.ConstraintViolation: if the condi... | entailment |
def load(self, *objs, consistent=False):
"""Populate objects from DynamoDB.
:param objs: objects to delete.
:param bool consistent: Use `strongly consistent reads`__ if True. Default is False.
:raises bloop.exceptions.MissingKey: if any object doesn't provide a value for a key column.
... | Populate objects from DynamoDB.
:param objs: objects to delete.
:param bool consistent: Use `strongly consistent reads`__ if True. Default is False.
:raises bloop.exceptions.MissingKey: if any object doesn't provide a value for a key column.
:raises bloop.exceptions.MissingObjects: if ... | entailment |
def query(self, model_or_index, key, filter=None, projection="all", consistent=False, forward=True):
"""Create a reusable :class:`~bloop.search.QueryIterator`.
:param model_or_index: A model or index to query. For example, ``User`` or ``User.by_email``.
:param key:
Key condition. ... | Create a reusable :class:`~bloop.search.QueryIterator`.
:param model_or_index: A model or index to query. For example, ``User`` or ``User.by_email``.
:param key:
Key condition. This must include an equality against the hash key, and optionally one
of a restricted set of condit... | entailment |
def save(self, *objs, condition=None, atomic=False):
"""Save one or more objects.
:param objs: objects to save.
:param condition: only perform each save if this condition holds.
:param bool atomic: only perform each save if the local and DynamoDB versions of the object match.
:r... | Save one or more objects.
:param objs: objects to save.
:param condition: only perform each save if this condition holds.
:param bool atomic: only perform each save if the local and DynamoDB versions of the object match.
:raises bloop.exceptions.ConstraintViolation: if the condition (or... | entailment |
def scan(self, model_or_index, filter=None, projection="all", consistent=False, parallel=None):
"""Create a reusable :class:`~bloop.search.ScanIterator`.
:param model_or_index: A model or index to scan. For example, ``User`` or ``User.by_email``.
:param filter: Filter condition. Only matching... | Create a reusable :class:`~bloop.search.ScanIterator`.
:param model_or_index: A model or index to scan. For example, ``User`` or ``User.by_email``.
:param filter: Filter condition. Only matching objects will be included in the results.
:param projection:
"all", "count", a list of ... | entailment |
def stream(self, model, position):
"""Create a :class:`~bloop.stream.Stream` that provides approximate chronological ordering.
.. code-block:: pycon
# Create a user so we have a record
>>> engine = Engine()
>>> user = User(id=3, email="user@domain.com")
... | Create a :class:`~bloop.stream.Stream` that provides approximate chronological ordering.
.. code-block:: pycon
# Create a user so we have a record
>>> engine = Engine()
>>> user = User(id=3, email="user@domain.com")
>>> engine.save(user)
>>> user.ema... | entailment |
def transaction(self, mode="w"):
"""
Create a new :class:`~bloop.transactions.ReadTransaction` or :class:`~bloop.transactions.WriteTransaction`.
As a context manager, calling commit when the block exits:
.. code-block:: pycon
>>> engine = Engine()
>>> user = Us... | Create a new :class:`~bloop.transactions.ReadTransaction` or :class:`~bloop.transactions.WriteTransaction`.
As a context manager, calling commit when the block exits:
.. code-block:: pycon
>>> engine = Engine()
>>> user = User(id=3, email="user@domain.com")
>>> twe... | entailment |
def _dump(self, value, **kwargs):
"""Entry point for serializing values. Most custom types should use :func:`~bloop.types.Type.dynamo_dump`.
This wraps the return value of :func:`~bloop.types.Type.dynamo_dump` in DynamoDB's wire format.
For example, serializing a string enum to an int:
... | Entry point for serializing values. Most custom types should use :func:`~bloop.types.Type.dynamo_dump`.
This wraps the return value of :func:`~bloop.types.Type.dynamo_dump` in DynamoDB's wire format.
For example, serializing a string enum to an int:
.. code-block:: python
value =... | entailment |
def _load(self, value, **kwargs):
"""Entry point for deserializing values. Most custom types should use :func:`~bloop.types.Type.dynamo_load`.
This unpacks DynamoDB's wire format and calls :func:`~bloop.types.Type.dynamo_load` on the inner value.
For example, deserializing an int to a string e... | Entry point for deserializing values. Most custom types should use :func:`~bloop.types.Type.dynamo_load`.
This unpacks DynamoDB's wire format and calls :func:`~bloop.types.Type.dynamo_load` on the inner value.
For example, deserializing an int to a string enum:
.. code-block:: python
... | entailment |
def backing_type_for(value):
"""Returns the DynamoDB backing type for a given python value's type
::
4 -> 'N'
['x', 3] -> 'L'
{2, 4} -> 'SS'
"""
if isinstance(value, str):
vtype = "S"
elif isinstance(value, bytes):
vty... | Returns the DynamoDB backing type for a given python value's type
::
4 -> 'N'
['x', 3] -> 'L'
{2, 4} -> 'SS' | entailment |
def stream_replicate():
"""Monitor changes in approximately real-time and replicate them"""
stream = primary.stream(SomeDataBlob, "trim_horizon")
next_heartbeat = pendulum.now()
while True:
now = pendulum.now()
if now >= next_heartbeat:
stream.heartbeat()
next_hea... | Monitor changes in approximately real-time and replicate them | entailment |
def _move_stream_endpoint(coordinator, position):
"""Move to the "trim_horizon" or "latest" of the entire stream."""
# 0) Everything will be rebuilt from DescribeStream.
stream_arn = coordinator.stream_arn
coordinator.roots.clear()
coordinator.active.clear()
coordinator.buffer.clear()
# 1) ... | Move to the "trim_horizon" or "latest" of the entire stream. | entailment |
def _move_stream_time(coordinator, time):
"""Scan through the *entire* Stream for the first record after ``time``.
This is an extremely expensive, naive algorithm that starts at trim_horizon and simply
dumps records into the void until the first hit. General improvements in performance are
tough; we c... | Scan through the *entire* Stream for the first record after ``time``.
This is an extremely expensive, naive algorithm that starts at trim_horizon and simply
dumps records into the void until the first hit. General improvements in performance are
tough; we can use the fact that Shards have a max life of 24... | entailment |
def _move_stream_token(coordinator, token):
"""Move to the Stream position described by the token.
The following rules are applied when interpolation is required:
- If a shard does not exist (past the trim_horizon) it is ignored. If that
shard had children, its children are also checked against the ... | Move to the Stream position described by the token.
The following rules are applied when interpolation is required:
- If a shard does not exist (past the trim_horizon) it is ignored. If that
shard had children, its children are also checked against the existing shards.
- If none of the shards in the... | entailment |
def advance_shards(self):
"""Poll active shards for records and insert them into the buffer. Rotate exhausted shards.
Returns immediately if the buffer isn't empty.
"""
# Don't poll shards when there are pending records.
if self.buffer:
return
# 0) Collect ... | Poll active shards for records and insert them into the buffer. Rotate exhausted shards.
Returns immediately if the buffer isn't empty. | entailment |
def heartbeat(self):
"""Keep active shards with "trim_horizon", "latest" iterators alive by advancing their iterators."""
for shard in self.active:
if shard.sequence_number is None:
records = next(shard)
# Success! This shard now has an ``at_sequence`` iterat... | Keep active shards with "trim_horizon", "latest" iterators alive by advancing their iterators. | entailment |
def token(self):
"""JSON-serializable representation of the current Stream state.
Use :func:`Engine.stream(YourModel, token) <bloop.engine.Engine.stream>` to create an identical stream,
or :func:`stream.move_to(token) <bloop.stream.Stream.move_to>` to move an existing stream to this position.
... | JSON-serializable representation of the current Stream state.
Use :func:`Engine.stream(YourModel, token) <bloop.engine.Engine.stream>` to create an identical stream,
or :func:`stream.move_to(token) <bloop.stream.Stream.move_to>` to move an existing stream to this position.
:returns: Stream sta... | entailment |
def remove_shard(self, shard, drop_buffered_records=False):
"""Remove a Shard from the Coordinator. Drops all buffered records from the Shard.
If the Shard is active or a root, it is removed and any children promoted to those roles.
:param shard: The shard to remove
:type shard: :cla... | Remove a Shard from the Coordinator. Drops all buffered records from the Shard.
If the Shard is active or a root, it is removed and any children promoted to those roles.
:param shard: The shard to remove
:type shard: :class:`~bloop.stream.shard.Shard`
:param bool drop_buffered_record... | entailment |
def move_to(self, position):
"""Set the Coordinator to a specific endpoint or time, or load state from a token.
:param position: "trim_horizon", "latest", :class:`~datetime.datetime`, or a
:attr:`Coordinator.token <bloop.stream.coordinator.Coordinator.token>`
"""
if isinstan... | Set the Coordinator to a specific endpoint or time, or load state from a token.
:param position: "trim_horizon", "latest", :class:`~datetime.datetime`, or a
:attr:`Coordinator.token <bloop.stream.coordinator.Coordinator.token>` | entailment |
def heap_item(clock, record, shard):
"""Create a tuple of (ordering, (record, shard)) for use in a RecordBuffer."""
# Primary ordering is by event creation time.
# However, creation time is *approximate* and has whole-second resolution.
# This means two events in the same shard within one second can't b... | Create a tuple of (ordering, (record, shard)) for use in a RecordBuffer. | entailment |
def push(self, record, shard):
"""Push a new record into the buffer
:param dict record: new record
:param shard: Shard the record came from
:type shard: :class:`~bloop.stream.shard.Shard`
"""
heapq.heappush(self.heap, heap_item(self.clock, record, shard)) | Push a new record into the buffer
:param dict record: new record
:param shard: Shard the record came from
:type shard: :class:`~bloop.stream.shard.Shard` | entailment |
def push_all(self, record_shard_pairs):
"""Push multiple (record, shard) pairs at once, with only one :meth:`heapq.heapify` call to maintain order.
:param record_shard_pairs: list of ``(record, shard)`` tuples
(see :func:`~bloop.stream.buffer.RecordBuffer.push`).
"""
# Faste... | Push multiple (record, shard) pairs at once, with only one :meth:`heapq.heapify` call to maintain order.
:param record_shard_pairs: list of ``(record, shard)`` tuples
(see :func:`~bloop.stream.buffer.RecordBuffer.push`). | entailment |
def loaded_columns(obj: BaseModel):
"""Yields each (name, value) tuple for all columns in an object that aren't missing"""
for column in sorted(obj.Meta.columns, key=lambda c: c.name):
value = getattr(obj, column.name, missing)
if value is not missing:
yield column.name, value | Yields each (name, value) tuple for all columns in an object that aren't missing | entailment |
def unpack_from_dynamodb(*, attrs, expected, model=None, obj=None, engine=None, context=None, **kwargs):
"""Push values by dynamo_name into an object"""
context = context or {"engine": engine}
engine = engine or context.get("engine", None)
if not engine:
raise ValueError("You must provide engine... | Push values by dynamo_name into an object | entailment |
def setdefault(obj, field, default):
"""Set an object's field to default if it doesn't have a value"""
setattr(obj, field, getattr(obj, field, default)) | Set an object's field to default if it doesn't have a value | entailment |
def bind_column(model, name, column, force=False, recursive=False, copy=False) -> Column:
"""Bind a column to the model with the given name.
This method is primarily used during BaseModel.__init_subclass__, although it can be used to easily
attach a new column to an existing model:
.. code-block:: pyt... | Bind a column to the model with the given name.
This method is primarily used during BaseModel.__init_subclass__, although it can be used to easily
attach a new column to an existing model:
.. code-block:: python
import bloop.models
class User(BaseModel):
id = Column(String, ... | entailment |
def bind_index(model, name, index, force=False, recursive=True, copy=False) -> Index:
"""Bind an index to the model with the given name.
This method is primarily used during BaseModel.__init_subclass__, although it can be used to easily
attach a new index to an existing model:
.. code-bloc... | Bind an index to the model with the given name.
This method is primarily used during BaseModel.__init_subclass__, although it can be used to easily
attach a new index to an existing model:
.. code-block:: python
import bloop.models
class User(BaseModel):
... | entailment |
def refresh_index(meta, index) -> None:
"""Recalculate the projection, hash_key, and range_key for the given index.
:param meta: model.Meta to find columns by name
:param index: The index to refresh
"""
# All projections include model + index keys
projection_keys = set.union(meta.keys, index.ke... | Recalculate the projection, hash_key, and range_key for the given index.
:param meta: model.Meta to find columns by name
:param index: The index to refresh | entailment |
def unbind(meta, name=None, dynamo_name=None) -> None:
"""Unconditionally remove any columns or indexes bound to the given name or dynamo_name.
.. code-block:: python
import bloop.models
class User(BaseModel):
id = Column(String, hash_key=True)
email = Column(String, ... | Unconditionally remove any columns or indexes bound to the given name or dynamo_name.
.. code-block:: python
import bloop.models
class User(BaseModel):
id = Column(String, hash_key=True)
email = Column(String, dynamo_name="e")
by_email = GlobalSecondaryIndex(p... | entailment |
def _load(cls, attrs, *, context, **kwargs):
""" dict (dynamo name) -> obj """
return unpack_from_dynamodb(
model=cls,
attrs=attrs or {},
expected=cls.Meta.columns,
context=context, **kwargs) | dict (dynamo name) -> obj | entailment |
def _dump(cls, obj, *, context, **kwargs):
""" obj -> dict """
if obj is None:
return None
dump = context["engine"]._dump
filtered = filter(
lambda item: item[1] is not None,
((
column.dynamo_name,
dump(column.typedef, g... | obj -> dict | entailment |
def is_valid_superset(actual_projection, index):
"""Returns True if the actual index is a valid superset of the expected index"""
projection_type = actual_projection["ProjectionType"]
if projection_type == "ALL":
return True
meta = index.model.Meta
# all index types provide index keys and mo... | Returns True if the actual index is a valid superset of the expected index | entailment |
def save_item(self, item):
"""Save an object to DynamoDB.
:param item: Unpacked into kwargs for :func:`boto3.DynamoDB.Client.update_item`.
:raises bloop.exceptions.ConstraintViolation: if the condition (or atomic) is not met.
"""
try:
self.dynamodb_client.update_item... | Save an object to DynamoDB.
:param item: Unpacked into kwargs for :func:`boto3.DynamoDB.Client.update_item`.
:raises bloop.exceptions.ConstraintViolation: if the condition (or atomic) is not met. | entailment |
def delete_item(self, item):
"""Delete an object in DynamoDB.
:param item: Unpacked into kwargs for :func:`boto3.DynamoDB.Client.delete_item`.
:raises bloop.exceptions.ConstraintViolation: if the condition (or atomic) is not met.
"""
try:
self.dynamodb_client.delete_... | Delete an object in DynamoDB.
:param item: Unpacked into kwargs for :func:`boto3.DynamoDB.Client.delete_item`.
:raises bloop.exceptions.ConstraintViolation: if the condition (or atomic) is not met. | entailment |
def load_items(self, items):
"""Loads any number of items in chunks, handling continuation tokens.
:param items: Unpacked in chunks into "RequestItems" for :func:`boto3.DynamoDB.Client.batch_get_item`.
"""
loaded_items = {}
requests = collections.deque(create_batch_get_chunks(it... | Loads any number of items in chunks, handling continuation tokens.
:param items: Unpacked in chunks into "RequestItems" for :func:`boto3.DynamoDB.Client.batch_get_item`. | entailment |
def search_items(self, mode, request):
"""Invoke query/scan by name.
Response always includes "Count" and "ScannedCount"
:param str mode: "query" or "scan"
:param request: Unpacked into :func:`boto3.DynamoDB.Client.query` or :func:`boto3.DynamoDB.Client.scan`
"""
valida... | Invoke query/scan by name.
Response always includes "Count" and "ScannedCount"
:param str mode: "query" or "scan"
:param request: Unpacked into :func:`boto3.DynamoDB.Client.query` or :func:`boto3.DynamoDB.Client.scan` | entailment |
def create_table(self, table_name, model):
"""Create the model's table. Returns True if the table is being created, False otherwise.
Does not wait for the table to create, and does not validate an existing table.
Will not raise "ResourceInUseException" if the table exists or is being created.
... | Create the model's table. Returns True if the table is being created, False otherwise.
Does not wait for the table to create, and does not validate an existing table.
Will not raise "ResourceInUseException" if the table exists or is being created.
:param str table_name: The name of the table ... | entailment |
def describe_table(self, table_name):
"""
Polls until the table is ready, then returns the first result when the table was ready.
The returned dict is standardized to ensure all fields are present, even when empty or across different
DynamoDB API versions.
TTL information is als... | Polls until the table is ready, then returns the first result when the table was ready.
The returned dict is standardized to ensure all fields are present, even when empty or across different
DynamoDB API versions.
TTL information is also inserted.
:param table_name: The name of the ta... | entailment |
def validate_table(self, table_name, model):
"""Polls until a creating table is ready, then verifies the description against the model's requirements.
The model may have a subset of all GSIs and LSIs on the table, but the key structure must be exactly
the same. The table must have a stream if ... | Polls until a creating table is ready, then verifies the description against the model's requirements.
The model may have a subset of all GSIs and LSIs on the table, but the key structure must be exactly
the same. The table must have a stream if the model expects one, but not the other way around. Wh... | entailment |
def enable_ttl(self, table_name, model):
"""Calls UpdateTimeToLive on the table according to model.Meta["ttl"]
:param table_name: The name of the table to enable the TTL setting on
:param model: The model to get TTL settings from
"""
self._tables.pop(table_name, None)
tt... | Calls UpdateTimeToLive on the table according to model.Meta["ttl"]
:param table_name: The name of the table to enable the TTL setting on
:param model: The model to get TTL settings from | entailment |
def enable_backups(self, table_name, model):
"""Calls UpdateContinuousBackups on the table according to model.Meta["continuous_backups"]
:param table_name: The name of the table to enable Continuous Backups on
:param model: The model to get Continuous Backups settings from
"""
s... | Calls UpdateContinuousBackups on the table according to model.Meta["continuous_backups"]
:param table_name: The name of the table to enable Continuous Backups on
:param model: The model to get Continuous Backups settings from | entailment |
def describe_stream(self, stream_arn, first_shard=None):
"""Wraps :func:`boto3.DynamoDBStreams.Client.describe_stream`, handling continuation tokens.
:param str stream_arn: Stream arn, usually from the model's ``Meta.stream["arn"]``.
:param str first_shard: *(Optional)* If provided, only shards... | Wraps :func:`boto3.DynamoDBStreams.Client.describe_stream`, handling continuation tokens.
:param str stream_arn: Stream arn, usually from the model's ``Meta.stream["arn"]``.
:param str first_shard: *(Optional)* If provided, only shards after this shard id will be returned.
:return: All shards i... | entailment |
def get_shard_iterator(self, *, stream_arn, shard_id, iterator_type, sequence_number=None):
"""Wraps :func:`boto3.DynamoDBStreams.Client.get_shard_iterator`.
:param str stream_arn: Stream arn. Usually :data:`Shard.stream_arn <bloop.stream.shard.Shard.stream_arn>`.
:param str shard_id: Shard id... | Wraps :func:`boto3.DynamoDBStreams.Client.get_shard_iterator`.
:param str stream_arn: Stream arn. Usually :data:`Shard.stream_arn <bloop.stream.shard.Shard.stream_arn>`.
:param str shard_id: Shard identifier. Usually :data:`Shard.shard_id <bloop.stream.shard.Shard.shard_id>`.
:param str itera... | entailment |
def get_stream_records(self, iterator_id):
"""Wraps :func:`boto3.DynamoDBStreams.Client.get_records`.
:param iterator_id: Iterator id. Usually :data:`Shard.iterator_id <bloop.stream.shard.Shard.iterator_id>`.
:return: Dict with "Records" list (may be empty) and "NextShardIterator" str (may not... | Wraps :func:`boto3.DynamoDBStreams.Client.get_records`.
:param iterator_id: Iterator id. Usually :data:`Shard.iterator_id <bloop.stream.shard.Shard.iterator_id>`.
:return: Dict with "Records" list (may be empty) and "NextShardIterator" str (may not exist).
:rtype: dict
:raises bloop.ex... | entailment |
def transaction_read(self, items):
"""
Wraps :func:`boto3.DynamoDB.Client.db.transact_get_items`.
:param items: Unpacked into "TransactionItems" for :func:`boto3.DynamoDB.Client.transact_get_items`
:raises bloop.exceptions.TransactionCanceled: if the transaction was canceled.
:r... | Wraps :func:`boto3.DynamoDB.Client.db.transact_get_items`.
:param items: Unpacked into "TransactionItems" for :func:`boto3.DynamoDB.Client.transact_get_items`
:raises bloop.exceptions.TransactionCanceled: if the transaction was canceled.
:return: Dict with "Records" list | entailment |
def transaction_write(self, items, client_request_token):
"""
Wraps :func:`boto3.DynamoDB.Client.db.transact_write_items`.
:param items: Unpacked into "TransactionItems" for :func:`boto3.DynamoDB.Client.transact_write_items`
:param client_request_token: Idempotency token valid for 10 mi... | Wraps :func:`boto3.DynamoDB.Client.db.transact_write_items`.
:param items: Unpacked into "TransactionItems" for :func:`boto3.DynamoDB.Client.transact_write_items`
:param client_request_token: Idempotency token valid for 10 minutes from first use.
Unpacked into "ClientRequestToken"
:... | entailment |
def check_hash_key(query_on, key):
"""Only allows == against query_on.hash_key"""
return (
isinstance(key, BaseCondition) and
(key.operation == "==") and
(key.column is query_on.hash_key)
) | Only allows == against query_on.hash_key | entailment |
def check_range_key(query_on, key):
"""BeginsWith, Between, or any Comparison except '!=' against query_on.range_key"""
return (
isinstance(key, BaseCondition) and
key.operation in ("begins_with", "between", "<", ">", "<=", ">=", "==") and
key.column is query_on.range_key
) | BeginsWith, Between, or any Comparison except '!=' against query_on.range_key | entailment |
def prepare(self):
"""Constructs a :class:`~bloop.search.PreparedSearch`."""
p = PreparedSearch()
p.prepare(
engine=self.engine,
mode=self.mode,
model=self.model,
index=self.index,
key=self.key,
filter=self.filter,
... | Constructs a :class:`~bloop.search.PreparedSearch`. | entailment |
def prepare(
self, engine=None, mode=None, model=None, index=None, key=None,
filter=None, projection=None, consistent=None, forward=None, parallel=None):
"""Validates the search parameters and builds the base request dict for each Query/Scan call."""
self.prepare_iterator_cls(en... | Validates the search parameters and builds the base request dict for each Query/Scan call. | entailment |
def count(self):
"""Number of items that have been loaded from DynamoDB so far, including buffered items."""
if self.request["Select"] == "COUNT":
while not self.exhausted:
next(self, None)
return self._count | Number of items that have been loaded from DynamoDB so far, including buffered items. | entailment |
def scanned(self):
"""Number of items that DynamoDB evaluated, before any filter was applied."""
if self.request["Select"] == "COUNT":
while not self.exhausted:
next(self, None)
return self._scanned | Number of items that DynamoDB evaluated, before any filter was applied. | entailment |
def first(self):
"""Return the first result. If there are no results, raises :exc:`~bloop.exceptions.ConstraintViolation`.
:return: The first result.
:raises bloop.exceptions.ConstraintViolation: No results.
"""
self.reset()
value = next(self, None)
if value is ... | Return the first result. If there are no results, raises :exc:`~bloop.exceptions.ConstraintViolation`.
:return: The first result.
:raises bloop.exceptions.ConstraintViolation: No results. | entailment |
def one(self):
"""Return the unique result. If there is not exactly one result,
raises :exc:`~bloop.exceptions.ConstraintViolation`.
:return: The unique result.
:raises bloop.exceptions.ConstraintViolation: Not exactly one result.
"""
first = self.first()
second... | Return the unique result. If there is not exactly one result,
raises :exc:`~bloop.exceptions.ConstraintViolation`.
:return: The unique result.
:raises bloop.exceptions.ConstraintViolation: Not exactly one result. | entailment |
def reset(self):
"""Reset to the initial state, clearing the buffer and zeroing count and scanned."""
self.buffer.clear()
self._count = 0
self._scanned = 0
self._exhausted = False
self.request.pop("ExclusiveStartKey", None) | Reset to the initial state, clearing the buffer and zeroing count and scanned. | entailment |
def by_alias(cls, name: str) -> "TxType":
"""get a type by the common bloop operation name: get/check/delete/save"""
return {
"get": TxType.Get,
"check": TxType.Check,
"delete": TxType.Delete,
"save": TxType.Update,
}[name] | get a type by the common bloop operation name: get/check/delete/save | entailment |
def prepare(self):
"""
Create a new PreparedTransaction that can be committed.
This is called automatically when exiting the transaction as a context:
.. code-block:: python
>>> engine = Engine()
>>> tx = WriteTransaction(engine)
>>> prepared = tx.p... | Create a new PreparedTransaction that can be committed.
This is called automatically when exiting the transaction as a context:
.. code-block:: python
>>> engine = Engine()
>>> tx = WriteTransaction(engine)
>>> prepared = tx.prepare()
>>> prepared.commi... | entailment |
def prepare(self, engine, mode, items) -> None:
"""
Create a unique transaction id and dumps the items into a cached request object.
"""
self.tx_id = str(uuid.uuid4()).replace("-", "")
self.engine = engine
self.mode = mode
self.items = items
self._prepare_... | Create a unique transaction id and dumps the items into a cached request object. | entailment |
def commit(self) -> None:
"""
Commit the transaction with a fixed transaction id.
A read transaction can call commit() any number of times, while a write transaction can only use the
same tx_id for 10 minutes from the first call.
"""
now = datetime.now(timezone.utc)
... | Commit the transaction with a fixed transaction id.
A read transaction can call commit() any number of times, while a write transaction can only use the
same tx_id for 10 minutes from the first call. | entailment |
def load(self, *objs) -> "ReadTransaction":
"""
Add one or more objects to be loaded in this transaction.
At most 10 items can be loaded in the same transaction. All objects will be loaded each time you
call commit().
:param objs: Objects to add to the set that are loaded in ... | Add one or more objects to be loaded in this transaction.
At most 10 items can be loaded in the same transaction. All objects will be loaded each time you
call commit().
:param objs: Objects to add to the set that are loaded in this transaction.
:return: this transaction for chaining... | entailment |
def check(self, obj, condition) -> "WriteTransaction":
"""
Add a condition which must be met for the transaction to commit.
While the condition is checked against the provided object, that object will not be modified. It is only
used to provide the hash and range key to apply the condi... | Add a condition which must be met for the transaction to commit.
While the condition is checked against the provided object, that object will not be modified. It is only
used to provide the hash and range key to apply the condition to.
At most 10 items can be checked, saved, or deleted in the... | entailment |
def save(self, *objs, condition=None, atomic=False) -> "WriteTransaction":
"""
Add one or more objects to be saved in this transaction.
At most 10 items can be checked, saved, or deleted in the same transaction. The same idempotency token will
be used for a single prepared transaction,... | Add one or more objects to be saved in this transaction.
At most 10 items can be checked, saved, or deleted in the same transaction. The same idempotency token will
be used for a single prepared transaction, which allows you to safely call commit on the PreparedCommit object
multiple times.
... | entailment |
def encode(self, cube_dimensions):
"""
Produces a numpy array of integers which encode
the supplied cube dimensions.
"""
return np.asarray([getattr(cube_dimensions[d], s)
for d in self._dimensions
for s in self._schema],
dtype=np.int32) | Produces a numpy array of integers which encode
the supplied cube dimensions. | entailment |
def decode(self, descriptor):
""" Produce a list of dictionaries for each dimension in this transcoder """
i = iter(descriptor)
n = len(self._schema)
# Add the name key to our schema
schema = self._schema + ('name',)
# For each dimensions, generator takes n items off ite... | Produce a list of dictionaries for each dimension in this transcoder | entailment |
def dl_cub(cub_url, cub_archive_name):
""" Download cub archive from cub_url and store it in cub_archive_name """
with open(cub_archive_name, 'wb') as f:
remote_file = urllib2.urlopen(cub_url)
meta = remote_file.info()
# The server may provide us with the size of the file.
cl_he... | Download cub archive from cub_url and store it in cub_archive_name | entailment |
def sha_hash_file(filename):
""" Compute the SHA1 hash of filename """
hash_sha = hashlib.sha1()
with open(filename, 'rb') as f:
for chunk in iter(lambda: f.read(1024*1024), b""):
hash_sha.update(chunk)
return hash_sha.hexdigest() | Compute the SHA1 hash of filename | entailment |
def install_cub(mb_inc_path):
""" Downloads and installs cub into mb_inc_path """
cub_url = 'https://github.com/NVlabs/cub/archive/1.6.4.zip'
cub_sha_hash = '0d5659200132c2576be0b3959383fa756de6105d'
cub_version_str = 'Current release: v1.6.4 (12/06/2016)'
cub_zip_file = 'cub.zip'
cub_zip_dir = ... | Downloads and installs cub into mb_inc_path | entailment |
def cuda_architecture_flags(device_info):
"""
Emit a list of architecture flags for each CUDA device found
['--gpu-architecture=sm_30', '--gpu-architecture=sm_52']
"""
# Figure out the necessary device architectures
if len(device_info['devices']) == 0:
archs = ['--gpu-architecture=sm_30'... | Emit a list of architecture flags for each CUDA device found
['--gpu-architecture=sm_30', '--gpu-architecture=sm_52'] | entailment |
def create_tensorflow_extension(nvcc_settings, device_info):
""" Create an extension that builds the custom tensorflow ops """
import tensorflow as tf
import glob
use_cuda = (bool(nvcc_settings['cuda_available'])
and tf.test.is_built_with_cuda())
# Source and includes
source_path = os.... | Create an extension that builds the custom tensorflow ops | entailment |
def updated_dimensions(self):
""" Inform montblanc about dimension sizes """
return [("ntime", args.ntime), # Timesteps
("nchan", args.nchan), # Channels
("na", args.na), # Antenna
("npsrc", len(lm_coords))] | Inform montblanc about dimension sizes | entailment |
def point_lm(self, context):
""" Supply point source lm coordinates to montblanc """
# Shape (npsrc, 2)
(ls, us), _ = context.array_extents(context.name)
return np.asarray(lm_coords[ls:us], dtype=context.dtype) | Supply point source lm coordinates to montblanc | entailment |
def point_stokes(self, context):
""" Supply point source stokes parameters to montblanc """
# Shape (npsrc, ntime, 4)
(ls, us), (lt, ut), (l, u) = context.array_extents(context.name)
data = np.empty(context.shape, context.dtype)
data[ls:us,:,l:u] = np.asarray(lm_stokes)[ls:us,N... | Supply point source stokes parameters to montblanc | entailment |
def uvw(self, context):
""" Supply UVW antenna coordinates to montblanc """
# Shape (ntime, na, 3)
(lt, ut), (la, ua), (l, u) = context.array_extents(context.name)
# Create empty UVW coordinates
data = np.empty(context.shape, context.dtype)
data[:,:,0] = np.arange(la+1,... | Supply UVW antenna coordinates to montblanc | entailment |
def reinitialize_command(self, command, reinit_subcommands):
"""
Monkeypatch distutils.Distribution.reinitialize_command() to match behavior
of Distribution.get_command_obj()
This fixes a problem where 'pip install -e' does not reinitialise options
using the setup(options={...}) variable for the bui... | Monkeypatch distutils.Distribution.reinitialize_command() to match behavior
of Distribution.get_command_obj()
This fixes a problem where 'pip install -e' does not reinitialise options
using the setup(options={...}) variable for the build_ext command.
This also effects other option sourcs such as setup.c... | entailment |
def nr_of_baselines(na, auto_correlations=False):
"""
Compute the number of baselines for the
given number of antenna. Can specify whether
auto-correlations should be taken into
account
"""
m = (na-1) if auto_correlations is False else (na+1)
return (na*m)//2 | Compute the number of baselines for the
given number of antenna. Can specify whether
auto-correlations should be taken into
account | entailment |
def nr_of_antenna(nbl, auto_correlations=False):
"""
Compute the number of antenna for the
given number of baselines. Can specify whether
auto-correlations should be taken into
account
"""
t = 1 if auto_correlations is False else -1
return int(t + math.sqrt(1 + 8*nbl)) // 2 | Compute the number of antenna for the
given number of baselines. Can specify whether
auto-correlations should be taken into
account | entailment |
def array_bytes(shape, dtype):
""" Estimates the memory in bytes required for an array of the supplied shape and dtype """
return np.product(shape)*np.dtype(dtype).itemsize | Estimates the memory in bytes required for an array of the supplied shape and dtype | entailment |
def random_like(ary=None, shape=None, dtype=None):
"""
Returns a random array of the same shape and type as the
supplied array argument, or the supplied shape and dtype
"""
if ary is not None:
shape, dtype = ary.shape, ary.dtype
elif shape is None or dtype is None:
raise ValueErr... | Returns a random array of the same shape and type as the
supplied array argument, or the supplied shape and dtype | entailment |
def flatten(nested):
""" Return a flatten version of the nested argument """
flat_return = list()
def __inner_flat(nested,flat):
for i in nested:
__inner_flat(i, flat) if isinstance(i, list) else flat.append(i)
return flat
__inner_flat(nested,flat_return)
return flat_r... | Return a flatten version of the nested argument | entailment |
def dict_array_bytes(ary, template):
"""
Return the number of bytes required by an array
Arguments
---------------
ary : dict
Dictionary representation of an array
template : dict
A dictionary of key-values, used to replace any
string values in the array with concrete in... | Return the number of bytes required by an array
Arguments
---------------
ary : dict
Dictionary representation of an array
template : dict
A dictionary of key-values, used to replace any
string values in the array with concrete integral
values
Returns
----------... | entailment |
def dict_array_bytes_required(arrays, template):
"""
Return the number of bytes required by
a dictionary of arrays.
Arguments
---------------
arrays : list
A list of dictionaries defining the arrays
template : dict
A dictionary of key-values, used to replace any
stri... | Return the number of bytes required by
a dictionary of arrays.
Arguments
---------------
arrays : list
A list of dictionaries defining the arrays
template : dict
A dictionary of key-values, used to replace any
string values in the arrays with concrete integral
values... | entailment |
def viable_dim_config(bytes_available, arrays, template,
dim_ord, nsolvers=1):
"""
Returns the number of timesteps possible, given the registered arrays
and a memory budget defined by bytes_available
Arguments
----------------
bytes_available : int
The memory budget, or availabl... | Returns the number of timesteps possible, given the registered arrays
and a memory budget defined by bytes_available
Arguments
----------------
bytes_available : int
The memory budget, or available number of bytes
for solving the problem.
arrays : list
List of dictionaries d... | entailment |
def shape_from_str_tuple(sshape, variables, ignore=None):
"""
Substitutes string values in the supplied shape parameter
with integer variables stored in a dictionary
Parameters
----------
sshape : tuple/string composed of integers and strings.
The strings should related to integral prop... | Substitutes string values in the supplied shape parameter
with integer variables stored in a dictionary
Parameters
----------
sshape : tuple/string composed of integers and strings.
The strings should related to integral properties
registered with this Solver object
variables : dict... | entailment |
def shape_list(l,shape,dtype):
""" Shape a list of lists into the appropriate shape and data type """
return np.array(l, dtype=dtype).reshape(shape) | Shape a list of lists into the appropriate shape and data type | entailment |
def array_convert_function(sshape_one, sshape_two, variables):
""" Return a function defining the conversion process between two NumPy
arrays of different shapes """
if not isinstance(sshape_one, tuple): sshape_one = (sshape_one,)
if not isinstance(sshape_two, tuple): sshape_two = (sshape_two,)
s_o... | Return a function defining the conversion process between two NumPy
arrays of different shapes | entailment |
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