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ageitgey/face_recognition | examples/face_recognition_knn.py | train | def train(train_dir, model_save_path=None, n_neighbors=None, knn_algo='ball_tree', verbose=False):
"""
Trains a k-nearest neighbors classifier for face recognition.
:param train_dir: directory that contains a sub-directory for each known person, with its name.
(View in source code to see train_dir ex... | python | def train(train_dir, model_save_path=None, n_neighbors=None, knn_algo='ball_tree', verbose=False):
"""
Trains a k-nearest neighbors classifier for face recognition.
:param train_dir: directory that contains a sub-directory for each known person, with its name.
(View in source code to see train_dir ex... | [
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ageitgey/face_recognition | examples/face_recognition_knn.py | predict | def predict(X_img_path, knn_clf=None, model_path=None, distance_threshold=0.6):
"""
Recognizes faces in given image using a trained KNN classifier
:param X_img_path: path to image to be recognized
:param knn_clf: (optional) a knn classifier object. if not specified, model_save_path must be specified.
... | python | def predict(X_img_path, knn_clf=None, model_path=None, distance_threshold=0.6):
"""
Recognizes faces in given image using a trained KNN classifier
:param X_img_path: path to image to be recognized
:param knn_clf: (optional) a knn classifier object. if not specified, model_save_path must be specified.
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ageitgey/face_recognition | examples/face_recognition_knn.py | show_prediction_labels_on_image | def show_prediction_labels_on_image(img_path, predictions):
"""
Shows the face recognition results visually.
:param img_path: path to image to be recognized
:param predictions: results of the predict function
:return:
"""
pil_image = Image.open(img_path).convert("RGB")
draw = ImageDraw.... | python | def show_prediction_labels_on_image(img_path, predictions):
"""
Shows the face recognition results visually.
:param img_path: path to image to be recognized
:param predictions: results of the predict function
:return:
"""
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ageitgey/face_recognition | face_recognition/api.py | _trim_css_to_bounds | def _trim_css_to_bounds(css, image_shape):
"""
Make sure a tuple in (top, right, bottom, left) order is within the bounds of the image.
:param css: plain tuple representation of the rect in (top, right, bottom, left) order
:param image_shape: numpy shape of the image array
:return: a trimmed plain... | python | def _trim_css_to_bounds(css, image_shape):
"""
Make sure a tuple in (top, right, bottom, left) order is within the bounds of the image.
:param css: plain tuple representation of the rect in (top, right, bottom, left) order
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ageitgey/face_recognition | face_recognition/api.py | face_distance | def face_distance(face_encodings, face_to_compare):
"""
Given a list of face encodings, compare them to a known face encoding and get a euclidean distance
for each comparison face. The distance tells you how similar the faces are.
:param faces: List of face encodings to compare
:param face_to_compa... | python | def face_distance(face_encodings, face_to_compare):
"""
Given a list of face encodings, compare them to a known face encoding and get a euclidean distance
for each comparison face. The distance tells you how similar the faces are.
:param faces: List of face encodings to compare
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ageitgey/face_recognition | face_recognition/api.py | load_image_file | def load_image_file(file, mode='RGB'):
"""
Loads an image file (.jpg, .png, etc) into a numpy array
:param file: image file name or file object to load
:param mode: format to convert the image to. Only 'RGB' (8-bit RGB, 3 channels) and 'L' (black and white) are supported.
:return: image contents as... | python | def load_image_file(file, mode='RGB'):
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ageitgey/face_recognition | face_recognition/api.py | _raw_face_locations | def _raw_face_locations(img, number_of_times_to_upsample=1, model="hog"):
"""
Returns an array of bounding boxes of human faces in a image
:param img: An image (as a numpy array)
:param number_of_times_to_upsample: How many times to upsample the image looking for faces. Higher numbers find smaller face... | python | def _raw_face_locations(img, number_of_times_to_upsample=1, model="hog"):
"""
Returns an array of bounding boxes of human faces in a image
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ageitgey/face_recognition | face_recognition/api.py | face_locations | def face_locations(img, number_of_times_to_upsample=1, model="hog"):
"""
Returns an array of bounding boxes of human faces in a image
:param img: An image (as a numpy array)
:param number_of_times_to_upsample: How many times to upsample the image looking for faces. Higher numbers find smaller faces.
... | python | def face_locations(img, number_of_times_to_upsample=1, model="hog"):
"""
Returns an array of bounding boxes of human faces in a image
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ageitgey/face_recognition | face_recognition/api.py | batch_face_locations | def batch_face_locations(images, number_of_times_to_upsample=1, batch_size=128):
"""
Returns an 2d array of bounding boxes of human faces in a image using the cnn face detector
If you are using a GPU, this can give you much faster results since the GPU
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"""
Returns an 2d array of bounding boxes of human faces in a image using the cnn face detector
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ageitgey/face_recognition | face_recognition/api.py | face_landmarks | def face_landmarks(face_image, face_locations=None, model="large"):
"""
Given an image, returns a dict of face feature locations (eyes, nose, etc) for each face in the image
:param face_image: image to search
:param face_locations: Optionally provide a list of face locations to check.
:param model:... | python | def face_landmarks(face_image, face_locations=None, model="large"):
"""
Given an image, returns a dict of face feature locations (eyes, nose, etc) for each face in the image
:param face_image: image to search
:param face_locations: Optionally provide a list of face locations to check.
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ageitgey/face_recognition | face_recognition/api.py | face_encodings | def face_encodings(face_image, known_face_locations=None, num_jitters=1):
"""
Given an image, return the 128-dimension face encoding for each face in the image.
:param face_image: The image that contains one or more faces
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apache/spark | python/pyspark/sql/types.py | _parse_datatype_string | def _parse_datatype_string(s):
"""
Parses the given data type string to a :class:`DataType`. The data type string format equals
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... | python | def _parse_datatype_string(s):
"""
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apache/spark | python/pyspark/sql/types.py | _infer_type | def _infer_type(obj):
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apache/spark | python/pyspark/sql/types.py | _infer_schema | def _infer_schema(row, names=None):
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apache/spark | python/pyspark/sql/types.py | _create_converter | def _create_converter(dataType):
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if isinstance(dataType, ArrayType):
conv = _create_converter(dataType.elementType)
return lambda row: [conv(v) for v in row]
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"""Create a converter to drop the names of fields in obj """
if not _need_converter(dataType):
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if isinstance(dataType, ArrayType):
conv = _create_converter(dataType.elementType)
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apache/spark | python/pyspark/sql/types.py | to_arrow_type | def to_arrow_type(dt):
""" Convert Spark data type to pyarrow type
"""
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arrow_type = pa.int16()
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""" Convert Spark data type to pyarrow type
"""
import pyarrow as pa
if type(dt) == BooleanType:
arrow_type = pa.bool_()
elif type(dt) == ByteType:
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apache/spark | python/pyspark/sql/types.py | from_arrow_type | def from_arrow_type(at):
""" Convert pyarrow type to Spark data type.
"""
import pyarrow.types as types
if types.is_boolean(at):
spark_type = BooleanType()
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spark_type = ByteType()
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spark_type = ShortType()
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""" Convert pyarrow type to Spark data type.
"""
import pyarrow.types as types
if types.is_boolean(at):
spark_type = BooleanType()
elif types.is_int8(at):
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apache/spark | python/pyspark/sql/types.py | _check_series_localize_timestamps | def _check_series_localize_timestamps(s, timezone):
"""
Convert timezone aware timestamps to timezone-naive in the specified timezone or local timezone.
If the input series is not a timestamp series, then the same series is returned. If the input
series is a timestamp series, then a converted series is... | python | def _check_series_localize_timestamps(s, timezone):
"""
Convert timezone aware timestamps to timezone-naive in the specified timezone or local timezone.
If the input series is not a timestamp series, then the same series is returned. If the input
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apache/spark | python/pyspark/sql/types.py | _check_dataframe_localize_timestamps | def _check_dataframe_localize_timestamps(pdf, timezone):
"""
Convert timezone aware timestamps to timezone-naive in the specified timezone or local timezone
:param pdf: pandas.DataFrame
:param timezone: the timezone to convert. if None then use local timezone
:return pandas.DataFrame where any time... | python | def _check_dataframe_localize_timestamps(pdf, timezone):
"""
Convert timezone aware timestamps to timezone-naive in the specified timezone or local timezone
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apache/spark | python/pyspark/sql/types.py | _check_series_convert_timestamps_internal | def _check_series_convert_timestamps_internal(s, timezone):
"""
Convert a tz-naive timestamp in the specified timezone or local timezone to UTC normalized for
Spark internal storage
:param s: a pandas.Series
:param timezone: the timezone to convert. if None then use local timezone
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"""
Convert a tz-naive timestamp in the specified timezone or local timezone to UTC normalized for
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apache/spark | python/pyspark/sql/types.py | _check_series_convert_timestamps_localize | def _check_series_convert_timestamps_localize(s, from_timezone, to_timezone):
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Convert timestamp to timezone-naive in the specified timezone or local timezone
:param s: a pandas.Series
:param from_timezone: the timezone to convert from. if None then use local timezone
:param to_timezone: the tim... | python | def _check_series_convert_timestamps_localize(s, from_timezone, to_timezone):
"""
Convert timestamp to timezone-naive in the specified timezone or local timezone
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apache/spark | python/pyspark/sql/types.py | StructType.add | def add(self, field, data_type=None, nullable=True, metadata=None):
"""
Construct a StructType by adding new elements to it to define the schema. The method accepts
either:
a) A single parameter which is a StructField object.
b) Between 2 and 4 parameters as (name, data_... | python | def add(self, field, data_type=None, nullable=True, metadata=None):
"""
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apache/spark | python/pyspark/sql/types.py | Row.asDict | def asDict(self, recursive=False):
"""
Return as an dict
:param recursive: turns the nested Row as dict (default: False).
>>> Row(name="Alice", age=11).asDict() == {'name': 'Alice', 'age': 11}
True
>>> row = Row(key=1, value=Row(name='a', age=2))
>>> row.asDict(... | python | def asDict(self, recursive=False):
"""
Return as an dict
:param recursive: turns the nested Row as dict (default: False).
>>> Row(name="Alice", age=11).asDict() == {'name': 'Alice', 'age': 11}
True
>>> row = Row(key=1, value=Row(name='a', age=2))
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apache/spark | python/pyspark/shuffle.py | ExternalMerger.mergeValues | def mergeValues(self, iterator):
""" Combine the items by creator and combiner """
# speedup attribute lookup
creator, comb = self.agg.createCombiner, self.agg.mergeValue
c, data, pdata, hfun, batch = 0, self.data, self.pdata, self._partition, self.batch
limit = self.memory_limit... | python | def mergeValues(self, iterator):
""" Combine the items by creator and combiner """
# speedup attribute lookup
creator, comb = self.agg.createCombiner, self.agg.mergeValue
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apache/spark | python/pyspark/shuffle.py | ExternalMerger.mergeCombiners | def mergeCombiners(self, iterator, limit=None):
""" Merge (K,V) pair by mergeCombiner """
if limit is None:
limit = self.memory_limit
# speedup attribute lookup
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""" Merge (K,V) pair by mergeCombiner """
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apache/spark | python/pyspark/shuffle.py | ExternalMerger._spill | def _spill(self):
"""
dump already partitioned data into disks.
It will dump the data in batch for better performance.
"""
global MemoryBytesSpilled, DiskBytesSpilled
path = self._get_spill_dir(self.spills)
if not os.path.exists(path):
os.makedirs(pat... | python | def _spill(self):
"""
dump already partitioned data into disks.
It will dump the data in batch for better performance.
"""
global MemoryBytesSpilled, DiskBytesSpilled
path = self._get_spill_dir(self.spills)
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apache/spark | python/pyspark/shuffle.py | ExternalMerger._external_items | def _external_items(self):
""" Return all partitioned items as iterator """
assert not self.data
if any(self.pdata):
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# disable partitioning and spilling when merge combiners from disk
self.pdata = []
try:
for i in range(self.partitio... | python | def _external_items(self):
""" Return all partitioned items as iterator """
assert not self.data
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# disable partitioning and spilling when merge combiners from disk
self.pdata = []
try:
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apache/spark | python/pyspark/shuffle.py | ExternalMerger._recursive_merged_items | def _recursive_merged_items(self, index):
"""
merge the partitioned items and return the as iterator
If one partition can not be fit in memory, then them will be
partitioned and merged recursively.
"""
subdirs = [os.path.join(d, "parts", str(index)) for d in self.localdi... | python | def _recursive_merged_items(self, index):
"""
merge the partitioned items and return the as iterator
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"""
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apache/spark | python/pyspark/shuffle.py | ExternalSorter.sorted | def sorted(self, iterator, key=None, reverse=False):
"""
Sort the elements in iterator, do external sort when the memory
goes above the limit.
"""
global MemoryBytesSpilled, DiskBytesSpilled
batch, limit = 100, self._next_limit()
chunks, current_chunk = [], []
... | python | def sorted(self, iterator, key=None, reverse=False):
"""
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"""
global MemoryBytesSpilled, DiskBytesSpilled
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apache/spark | python/pyspark/shuffle.py | ExternalGroupBy._spill | def _spill(self):
"""
dump already partitioned data into disks.
"""
global MemoryBytesSpilled, DiskBytesSpilled
path = self._get_spill_dir(self.spills)
if not os.path.exists(path):
os.makedirs(path)
used_memory = get_used_memory()
if not self.... | python | def _spill(self):
"""
dump already partitioned data into disks.
"""
global MemoryBytesSpilled, DiskBytesSpilled
path = self._get_spill_dir(self.spills)
if not os.path.exists(path):
os.makedirs(path)
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apache/spark | python/pyspark/shuffle.py | ExternalGroupBy._merge_sorted_items | def _merge_sorted_items(self, index):
""" load a partition from disk, then sort and group by key """
def load_partition(j):
path = self._get_spill_dir(j)
p = os.path.join(path, str(index))
with open(p, 'rb', 65536) as f:
for v in self.serializer.load_s... | python | def _merge_sorted_items(self, index):
""" load a partition from disk, then sort and group by key """
def load_partition(j):
path = self._get_spill_dir(j)
p = os.path.join(path, str(index))
with open(p, 'rb', 65536) as f:
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apache/spark | python/pyspark/daemon.py | worker | def worker(sock, authenticated):
"""
Called by a worker process after the fork().
"""
signal.signal(SIGHUP, SIG_DFL)
signal.signal(SIGCHLD, SIG_DFL)
signal.signal(SIGTERM, SIG_DFL)
# restore the handler for SIGINT,
# it's useful for debugging (show the stacktrace before exit)
signal.... | python | def worker(sock, authenticated):
"""
Called by a worker process after the fork().
"""
signal.signal(SIGHUP, SIG_DFL)
signal.signal(SIGCHLD, SIG_DFL)
signal.signal(SIGTERM, SIG_DFL)
# restore the handler for SIGINT,
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apache/spark | python/pyspark/rdd.py | portable_hash | def portable_hash(x):
"""
This function returns consistent hash code for builtin types, especially
for None and tuple with None.
The algorithm is similar to that one used by CPython 2.7
>>> portable_hash(None)
0
>>> portable_hash((None, 1)) & 0xffffffff
219750521
"""
if sys.ve... | python | def portable_hash(x):
"""
This function returns consistent hash code for builtin types, especially
for None and tuple with None.
The algorithm is similar to that one used by CPython 2.7
>>> portable_hash(None)
0
>>> portable_hash((None, 1)) & 0xffffffff
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apache/spark | python/pyspark/rdd.py | _parse_memory | def _parse_memory(s):
"""
Parse a memory string in the format supported by Java (e.g. 1g, 200m) and
return the value in MiB
>>> _parse_memory("256m")
256
>>> _parse_memory("2g")
2048
"""
units = {'g': 1024, 'm': 1, 't': 1 << 20, 'k': 1.0 / 1024}
if s[-1].lower() not in units:
... | python | def _parse_memory(s):
"""
Parse a memory string in the format supported by Java (e.g. 1g, 200m) and
return the value in MiB
>>> _parse_memory("256m")
256
>>> _parse_memory("2g")
2048
"""
units = {'g': 1024, 'm': 1, 't': 1 << 20, 'k': 1.0 / 1024}
if s[-1].lower() not in units:
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apache/spark | python/pyspark/rdd.py | ignore_unicode_prefix | def ignore_unicode_prefix(f):
"""
Ignore the 'u' prefix of string in doc tests, to make it works
in both python 2 and 3
"""
if sys.version >= '3':
# the representation of unicode string in Python 3 does not have prefix 'u',
# so remove the prefix 'u' for doc tests
literal_re ... | python | def ignore_unicode_prefix(f):
"""
Ignore the 'u' prefix of string in doc tests, to make it works
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"""
if sys.version >= '3':
# the representation of unicode string in Python 3 does not have prefix 'u',
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apache/spark | python/pyspark/rdd.py | RDD.persist | def persist(self, storageLevel=StorageLevel.MEMORY_ONLY):
"""
Set this RDD's storage level to persist its values across operations
after the first time it is computed. This can only be used to assign
a new storage level if the RDD does not have a storage level set yet.
If no stor... | python | def persist(self, storageLevel=StorageLevel.MEMORY_ONLY):
"""
Set this RDD's storage level to persist its values across operations
after the first time it is computed. This can only be used to assign
a new storage level if the RDD does not have a storage level set yet.
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apache/spark | python/pyspark/rdd.py | RDD.flatMap | def flatMap(self, f, preservesPartitioning=False):
"""
Return a new RDD by first applying a function to all elements of this
RDD, and then flattening the results.
>>> rdd = sc.parallelize([2, 3, 4])
>>> sorted(rdd.flatMap(lambda x: range(1, x)).collect())
[1, 1, 1, 2, 2,... | python | def flatMap(self, f, preservesPartitioning=False):
"""
Return a new RDD by first applying a function to all elements of this
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>>> rdd = sc.parallelize([2, 3, 4])
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apache/spark | python/pyspark/rdd.py | RDD.mapPartitionsWithSplit | def mapPartitionsWithSplit(self, f, preservesPartitioning=False):
"""
Deprecated: use mapPartitionsWithIndex instead.
Return a new RDD by applying a function to each partition of this RDD,
while tracking the index of the original partition.
>>> rdd = sc.parallelize([1, 2, 3, 4]... | python | def mapPartitionsWithSplit(self, f, preservesPartitioning=False):
"""
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apache/spark | python/pyspark/rdd.py | RDD.sample | def sample(self, withReplacement, fraction, seed=None):
"""
Return a sampled subset of this RDD.
:param withReplacement: can elements be sampled multiple times (replaced when sampled out)
:param fraction: expected size of the sample as a fraction of this RDD's size
without r... | python | def sample(self, withReplacement, fraction, seed=None):
"""
Return a sampled subset of this RDD.
:param withReplacement: can elements be sampled multiple times (replaced when sampled out)
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apache/spark | python/pyspark/rdd.py | RDD.randomSplit | def randomSplit(self, weights, seed=None):
"""
Randomly splits this RDD with the provided weights.
:param weights: weights for splits, will be normalized if they don't sum to 1
:param seed: random seed
:return: split RDDs in a list
>>> rdd = sc.parallelize(range(500), 1... | python | def randomSplit(self, weights, seed=None):
"""
Randomly splits this RDD with the provided weights.
:param weights: weights for splits, will be normalized if they don't sum to 1
:param seed: random seed
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] | 618d6bff71073c8c93501ab7392c3cc579730f0b | https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/rdd.py#L438-L462 | train | Randomly splits this RDD with the provided weights. |
apache/spark | python/pyspark/rdd.py | RDD.takeSample | def takeSample(self, withReplacement, num, seed=None):
"""
Return a fixed-size sampled subset of this RDD.
.. note:: This method should only be used if the resulting array is expected
to be small, as all the data is loaded into the driver's memory.
>>> rdd = sc.parallelize(... | python | def takeSample(self, withReplacement, num, seed=None):
"""
Return a fixed-size sampled subset of this RDD.
.. note:: This method should only be used if the resulting array is expected
to be small, as all the data is loaded into the driver's memory.
>>> rdd = sc.parallelize(... | [
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>>> rdd = sc.parallelize(range(0, 10))
>>> len(rdd.takeSample(True, 20, 1))
20
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] | 618d6bff71073c8c93501ab7392c3cc579730f0b | https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/rdd.py#L465-L518 | train | Return a fixed - size sampled subset of this RDD. |
apache/spark | python/pyspark/rdd.py | RDD._computeFractionForSampleSize | def _computeFractionForSampleSize(sampleSizeLowerBound, total, withReplacement):
"""
Returns a sampling rate that guarantees a sample of
size >= sampleSizeLowerBound 99.99% of the time.
How the sampling rate is determined:
Let p = num / total, where num is the sample size and to... | python | def _computeFractionForSampleSize(sampleSizeLowerBound, total, withReplacement):
"""
Returns a sampling rate that guarantees a sample of
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How the sampling rate is determined:
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] | 618d6bff71073c8c93501ab7392c3cc579730f0b | https://github.com/apache/spark/blob/618d6bff71073c8c93501ab7392c3cc579730f0b/python/pyspark/rdd.py#L521-L551 | train | Compute the sampling rate for a specific sample size. |
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