INSTRUCTION stringlengths 1 8.43k | RESPONSE stringlengths 75 104k |
|---|---|
Get item from object for given key ( DataFrame column Panel slice etc. ). Returns default value if not found. | def get(self, key, default=None):
"""
Get item from object for given key (DataFrame column, Panel slice,
etc.). Returns default value if not found.
Parameters
----------
key : object
Returns
-------
value : same type as items contained in object
... |
Return the cached item item represents a label indexer. | def _get_item_cache(self, item):
"""Return the cached item, item represents a label indexer."""
cache = self._item_cache
res = cache.get(item)
if res is None:
values = self._data.get(item)
res = self._box_item_values(item, values)
cache[item] = res
... |
Set the _cacher attribute on the calling object with a weakref to cacher. | def _set_as_cached(self, item, cacher):
"""Set the _cacher attribute on the calling object with a weakref to
cacher.
"""
self._cacher = (item, weakref.ref(cacher)) |
Return the cached item item represents a positional indexer. | def _iget_item_cache(self, item):
"""Return the cached item, item represents a positional indexer."""
ax = self._info_axis
if ax.is_unique:
lower = self._get_item_cache(ax[item])
else:
lower = self._take(item, axis=self._info_axis_number)
return lower |
See if we need to update our parent cacher if clear then clear our cache. | def _maybe_update_cacher(self, clear=False, verify_is_copy=True):
"""
See if we need to update our parent cacher if clear, then clear our
cache.
Parameters
----------
clear : boolean, default False
clear the item cache
verify_is_copy : boolean, defaul... |
Construct a slice of this container. | def _slice(self, slobj, axis=0, kind=None):
"""
Construct a slice of this container.
kind parameter is maintained for compatibility with Series slicing.
"""
axis = self._get_block_manager_axis(axis)
result = self._constructor(self._data.get_slice(slobj, axis=axis))
... |
Check if we are a view have a cacher and are of mixed type. If so then force a setitem_copy check. | def _check_is_chained_assignment_possible(self):
"""
Check if we are a view, have a cacher, and are of mixed type.
If so, then force a setitem_copy check.
Should be called just near setting a value
Will return a boolean if it we are a view and are cached, but a
single-d... |
Return the elements in the given * positional * indices along an axis. | def _take(self, indices, axis=0, is_copy=True):
"""
Return the elements in the given *positional* indices along an axis.
This means that we are not indexing according to actual values in
the index attribute of the object. We are indexing according to the
actual position of the e... |
Return the elements in the given * positional * indices along an axis. | def take(self, indices, axis=0, convert=None, is_copy=True, **kwargs):
"""
Return the elements in the given *positional* indices along an axis.
This means that we are not indexing according to actual values in
the index attribute of the object. We are indexing according to the
a... |
Return cross - section from the Series/ DataFrame. | def xs(self, key, axis=0, level=None, drop_level=True):
"""
Return cross-section from the Series/DataFrame.
This method takes a `key` argument to select data at a particular
level of a MultiIndex.
Parameters
----------
key : label or tuple of label
L... |
Return data corresponding to axis labels matching criteria. | def select(self, crit, axis=0):
"""
Return data corresponding to axis labels matching criteria.
.. deprecated:: 0.21.0
Use df.loc[df.index.map(crit)] to select via labels
Parameters
----------
crit : function
To be called on each index (label). S... |
Return an object with matching indices as other object. | def reindex_like(self, other, method=None, copy=True, limit=None,
tolerance=None):
"""
Return an object with matching indices as other object.
Conform the object to the same index on all axes. Optional
filling logic, placing NaN in locations having no value
... |
Drop labels from specified axis. Used in the drop method internally. | def _drop_axis(self, labels, axis, level=None, errors='raise'):
"""
Drop labels from specified axis. Used in the ``drop`` method
internally.
Parameters
----------
labels : single label or list-like
axis : int or axis name
level : int or level name, defaul... |
Replace self internals with result. | def _update_inplace(self, result, verify_is_copy=True):
"""
Replace self internals with result.
Parameters
----------
verify_is_copy : boolean, default True
provide is_copy checks
"""
# NOTE: This does *not* call __finalize__ and that's an explicit
... |
Prefix labels with string prefix. | def add_prefix(self, prefix):
"""
Prefix labels with string `prefix`.
For Series, the row labels are prefixed.
For DataFrame, the column labels are prefixed.
Parameters
----------
prefix : str
The string to add before each label.
Returns
... |
Suffix labels with string suffix. | def add_suffix(self, suffix):
"""
Suffix labels with string `suffix`.
For Series, the row labels are suffixed.
For DataFrame, the column labels are suffixed.
Parameters
----------
suffix : str
The string to add after each label.
Returns
... |
Sort by the values along either axis. | def sort_values(self, by=None, axis=0, ascending=True, inplace=False,
kind='quicksort', na_position='last'):
"""
Sort by the values along either axis.
Parameters
----------%(optional_by)s
axis : %(axes_single_arg)s, default 0
Axis to be sorted.
... |
Sort object by labels ( along an axis ). | def sort_index(self, axis=0, level=None, ascending=True, inplace=False,
kind='quicksort', na_position='last', sort_remaining=True):
"""
Sort object by labels (along an axis).
Parameters
----------
axis : {0 or 'index', 1 or 'columns'}, default 0
Th... |
Conform % ( klass ) s to new index with optional filling logic placing NA/ NaN in locations having no value in the previous index. A new object is produced unless the new index is equivalent to the current one and copy = False. | def reindex(self, *args, **kwargs):
"""
Conform %(klass)s to new index with optional filling logic, placing
NA/NaN in locations having no value in the previous index. A new object
is produced unless the new index is equivalent to the current one and
``copy=False``.
Param... |
Perform the reindex for all the axes. | def _reindex_axes(self, axes, level, limit, tolerance, method, fill_value,
copy):
"""Perform the reindex for all the axes."""
obj = self
for a in self._AXIS_ORDERS:
labels = axes[a]
if labels is None:
continue
ax = self._... |
Check if we do need a multi reindex. | def _needs_reindex_multi(self, axes, method, level):
"""Check if we do need a multi reindex."""
return ((com.count_not_none(*axes.values()) == self._AXIS_LEN) and
method is None and level is None and not self._is_mixed_type) |
allow_dups indicates an internal call here | def _reindex_with_indexers(self, reindexers, fill_value=None, copy=False,
allow_dups=False):
"""allow_dups indicates an internal call here """
# reindex doing multiple operations on different axes if indicated
new_data = self._data
for axis in sorted(reind... |
Subset rows or columns of dataframe according to labels in the specified index. | def filter(self, items=None, like=None, regex=None, axis=None):
"""
Subset rows or columns of dataframe according to labels in
the specified index.
Note that this routine does not filter a dataframe on its
contents. The filter is applied to the labels of the index.
Para... |
Return a random sample of items from an axis of object. | def sample(self, n=None, frac=None, replace=False, weights=None,
random_state=None, axis=None):
"""
Return a random sample of items from an axis of object.
You can use `random_state` for reproducibility.
Parameters
----------
n : int, optional
... |
add the string - like attributes from the info_axis. If info_axis is a MultiIndex it s first level values are used. | def _dir_additions(self):
""" add the string-like attributes from the info_axis.
If info_axis is a MultiIndex, it's first level values are used.
"""
additions = {c for c in self._info_axis.unique(level=0)[:100]
if isinstance(c, str) and c.isidentifier()}
retu... |
Consolidate _data -- if the blocks have changed then clear the cache | def _protect_consolidate(self, f):
"""Consolidate _data -- if the blocks have changed, then clear the
cache
"""
blocks_before = len(self._data.blocks)
result = f()
if len(self._data.blocks) != blocks_before:
self._clear_item_cache()
return result |
Consolidate data in place and return None | def _consolidate_inplace(self):
"""Consolidate data in place and return None"""
def f():
self._data = self._data.consolidate()
self._protect_consolidate(f) |
Compute NDFrame with consolidated internals ( data of each dtype grouped together in a single ndarray ). | def _consolidate(self, inplace=False):
"""
Compute NDFrame with "consolidated" internals (data of each dtype
grouped together in a single ndarray).
Parameters
----------
inplace : boolean, default False
If False return new object, otherwise modify existing ob... |
check whether we allow in - place setting with this type of value | def _check_inplace_setting(self, value):
""" check whether we allow in-place setting with this type of value """
if self._is_mixed_type:
if not self._is_numeric_mixed_type:
# allow an actual np.nan thru
try:
if np.isnan(value):
... |
Convert the frame to its Numpy - array representation. | def as_matrix(self, columns=None):
"""
Convert the frame to its Numpy-array representation.
.. deprecated:: 0.23.0
Use :meth:`DataFrame.values` instead.
Parameters
----------
columns : list, optional, default:None
If None, return all columns, oth... |
Return a Numpy representation of the DataFrame. | def values(self):
"""
Return a Numpy representation of the DataFrame.
.. warning::
We recommend using :meth:`DataFrame.to_numpy` instead.
Only the values in the DataFrame will be returned, the axes labels
will be removed.
Returns
-------
num... |
Return counts of unique ftypes in this object. | def get_ftype_counts(self):
"""
Return counts of unique ftypes in this object.
.. deprecated:: 0.23.0
This is useful for SparseDataFrame or for DataFrames containing
sparse arrays.
Returns
-------
dtype : Series
Series with the count of colu... |
Return the dtypes in the DataFrame. | def dtypes(self):
"""
Return the dtypes in the DataFrame.
This returns a Series with the data type of each column.
The result's index is the original DataFrame's columns. Columns
with mixed types are stored with the ``object`` dtype. See
:ref:`the User Guide <basics.dtyp... |
Return the ftypes ( indication of sparse/ dense and dtype ) in DataFrame. | def ftypes(self):
"""
Return the ftypes (indication of sparse/dense and dtype) in DataFrame.
This returns a Series with the data type of each column.
The result's index is the original DataFrame's columns. Columns
with mixed types are stored with the ``object`` dtype. See
... |
Convert the frame to a dict of dtype - > Constructor Types that each has a homogeneous dtype. | def as_blocks(self, copy=True):
"""
Convert the frame to a dict of dtype -> Constructor Types that each has
a homogeneous dtype.
.. deprecated:: 0.21.0
NOTE: the dtypes of the blocks WILL BE PRESERVED HERE (unlike in
as_matrix)
Parameters
--------... |
Return a dict of dtype - > Constructor Types that each is a homogeneous dtype. | def _to_dict_of_blocks(self, copy=True):
"""
Return a dict of dtype -> Constructor Types that
each is a homogeneous dtype.
Internal ONLY
"""
return {k: self._constructor(v).__finalize__(self)
for k, v, in self._data.to_dict(copy=copy).items()} |
Cast a pandas object to a specified dtype dtype. | def astype(self, dtype, copy=True, errors='raise', **kwargs):
"""
Cast a pandas object to a specified dtype ``dtype``.
Parameters
----------
dtype : data type, or dict of column name -> data type
Use a numpy.dtype or Python type to cast entire pandas object to
... |
Make a copy of this object s indices and data. | def copy(self, deep=True):
"""
Make a copy of this object's indices and data.
When ``deep=True`` (default), a new object will be created with a
copy of the calling object's data and indices. Modifications to
the data or indices of the copy will not be reflected in the
or... |
Attempt to infer better dtype for object columns | def _convert(self, datetime=False, numeric=False, timedelta=False,
coerce=False, copy=True):
"""
Attempt to infer better dtype for object columns
Parameters
----------
datetime : boolean, default False
If True, convert to date where possible.
... |
Attempt to infer better dtype for object columns. | def convert_objects(self, convert_dates=True, convert_numeric=False,
convert_timedeltas=True, copy=True):
"""
Attempt to infer better dtype for object columns.
.. deprecated:: 0.21.0
Parameters
----------
convert_dates : boolean, default True
... |
Attempt to infer better dtypes for object columns. | def infer_objects(self):
"""
Attempt to infer better dtypes for object columns.
Attempts soft conversion of object-dtyped
columns, leaving non-object and unconvertible
columns unchanged. The inference rules are the
same as during normal Series/DataFrame construction.
... |
Fill NA/ NaN values using the specified method. | def fillna(self, value=None, method=None, axis=None, inplace=False,
limit=None, downcast=None):
"""
Fill NA/NaN values using the specified method.
Parameters
----------
value : scalar, dict, Series, or DataFrame
Value to use to fill holes (e.g. 0), alt... |
Interpolate values according to different methods. | def interpolate(self, method='linear', axis=0, limit=None, inplace=False,
limit_direction='forward', limit_area=None,
downcast=None, **kwargs):
"""
Interpolate values according to different methods.
"""
inplace = validate_bool_kwarg(inplace, 'inpla... |
Return the last row ( s ) without any NaNs before where. | def asof(self, where, subset=None):
"""
Return the last row(s) without any NaNs before `where`.
The last row (for each element in `where`, if list) without any
NaN is taken.
In case of a :class:`~pandas.DataFrame`, the last row without NaN
considering only the subset of ... |
Trim values at input threshold ( s ). | def clip(self, lower=None, upper=None, axis=None, inplace=False,
*args, **kwargs):
"""
Trim values at input threshold(s).
Assigns values outside boundary to boundary values. Thresholds
can be singular values or array like, and in the latter case
the clipping is perf... |
Trim values above a given threshold. | def clip_upper(self, threshold, axis=None, inplace=False):
"""
Trim values above a given threshold.
.. deprecated:: 0.24.0
Use clip(upper=threshold) instead.
Elements above the `threshold` will be changed to match the
`threshold` value(s). Threshold can be a single ... |
Trim values below a given threshold. | def clip_lower(self, threshold, axis=None, inplace=False):
"""
Trim values below a given threshold.
.. deprecated:: 0.24.0
Use clip(lower=threshold) instead.
Elements below the `threshold` will be changed to match the
`threshold` value(s). Threshold can be a single ... |
Group DataFrame or Series using a mapper or by a Series of columns. | def groupby(self, by=None, axis=0, level=None, as_index=True, sort=True,
group_keys=True, squeeze=False, observed=False, **kwargs):
"""
Group DataFrame or Series using a mapper or by a Series of columns.
A groupby operation involves some combination of splitting the
obje... |
Convert TimeSeries to specified frequency. | def asfreq(self, freq, method=None, how=None, normalize=False,
fill_value=None):
"""
Convert TimeSeries to specified frequency.
Optionally provide filling method to pad/backfill missing values.
Returns the original data conformed to a new index with the specified
... |
Select values at particular time of day ( e. g. 9: 30AM ). | def at_time(self, time, asof=False, axis=None):
"""
Select values at particular time of day (e.g. 9:30AM).
Parameters
----------
time : datetime.time or str
axis : {0 or 'index', 1 or 'columns'}, default 0
.. versionadded:: 0.24.0
Returns
--... |
Select values between particular times of the day ( e. g. 9: 00 - 9: 30 AM ). | def between_time(self, start_time, end_time, include_start=True,
include_end=True, axis=None):
"""
Select values between particular times of the day (e.g., 9:00-9:30 AM).
By setting ``start_time`` to be later than ``end_time``,
you can get the times that are *not* b... |
Resample time - series data. | def resample(self, rule, how=None, axis=0, fill_method=None, closed=None,
label=None, convention='start', kind=None, loffset=None,
limit=None, base=0, on=None, level=None):
"""
Resample time-series data.
Convenience method for frequency conversion and resamplin... |
Convenience method for subsetting initial periods of time series data based on a date offset. | def first(self, offset):
"""
Convenience method for subsetting initial periods of time series data
based on a date offset.
Parameters
----------
offset : string, DateOffset, dateutil.relativedelta
Returns
-------
subset : same type as caller
... |
Convenience method for subsetting final periods of time series data based on a date offset. | def last(self, offset):
"""
Convenience method for subsetting final periods of time series data
based on a date offset.
Parameters
----------
offset : string, DateOffset, dateutil.relativedelta
Returns
-------
subset : same type as caller
... |
Compute numerical data ranks ( 1 through n ) along axis. Equal values are assigned a rank that is the average of the ranks of those values. | def rank(self, axis=0, method='average', numeric_only=None,
na_option='keep', ascending=True, pct=False):
"""
Compute numerical data ranks (1 through n) along axis. Equal values are
assigned a rank that is the average of the ranks of those values.
Parameters
-------... |
Equivalent to public method where except that other is not applied as a function even if callable. Used in __setitem__. | def _where(self, cond, other=np.nan, inplace=False, axis=None, level=None,
errors='raise', try_cast=False):
"""
Equivalent to public method `where`, except that `other` is not
applied as a function even if callable. Used in __setitem__.
"""
inplace = validate_bool_... |
Equivalent to shift without copying data. The shifted data will not include the dropped periods and the shifted axis will be smaller than the original. | def slice_shift(self, periods=1, axis=0):
"""
Equivalent to `shift` without copying data. The shifted data will
not include the dropped periods and the shifted axis will be smaller
than the original.
Parameters
----------
periods : int
Number of perio... |
Shift the time index using the index s frequency if available. | def tshift(self, periods=1, freq=None, axis=0):
"""
Shift the time index, using the index's frequency if available.
Parameters
----------
periods : int
Number of periods to move, can be positive or negative
freq : DateOffset, timedelta, or time rule string, d... |
Truncate a Series or DataFrame before and after some index value. | def truncate(self, before=None, after=None, axis=None, copy=True):
"""
Truncate a Series or DataFrame before and after some index value.
This is a useful shorthand for boolean indexing based on index
values above or below certain thresholds.
Parameters
----------
... |
Convert tz - aware axis to target time zone. | def tz_convert(self, tz, axis=0, level=None, copy=True):
"""
Convert tz-aware axis to target time zone.
Parameters
----------
tz : string or pytz.timezone object
axis : the axis to convert
level : int, str, default None
If axis ia a MultiIndex, conver... |
Localize tz - naive index of a Series or DataFrame to target time zone. | def tz_localize(self, tz, axis=0, level=None, copy=True,
ambiguous='raise', nonexistent='raise'):
"""
Localize tz-naive index of a Series or DataFrame to target time zone.
This operation localizes the Index. To localize the values in a
timezone-naive Series, use :met... |
Generate descriptive statistics that summarize the central tendency dispersion and shape of a dataset s distribution excluding NaN values. | def describe(self, percentiles=None, include=None, exclude=None):
"""
Generate descriptive statistics that summarize the central tendency,
dispersion and shape of a dataset's distribution, excluding
``NaN`` values.
Analyzes both numeric and object series, as well
as ``Da... |
Validate percentiles ( used by describe and quantile ). | def _check_percentile(self, q):
"""
Validate percentiles (used by describe and quantile).
"""
msg = ("percentiles should all be in the interval [0, 1]. "
"Try {0} instead.")
q = np.asarray(q)
if q.ndim == 0:
if not 0 <= q <= 1:
... |
Add the operations to the cls ; evaluate the doc strings again | def _add_numeric_operations(cls):
"""
Add the operations to the cls; evaluate the doc strings again
"""
axis_descr, name, name2 = _doc_parms(cls)
cls.any = _make_logical_function(
cls, 'any', name, name2, axis_descr, _any_desc, nanops.nanany,
_any_see_al... |
Add the series only operations to the cls ; evaluate the doc strings again. | def _add_series_only_operations(cls):
"""
Add the series only operations to the cls; evaluate the doc
strings again.
"""
axis_descr, name, name2 = _doc_parms(cls)
def nanptp(values, axis=0, skipna=True):
nmax = nanops.nanmax(values, axis, skipna)
... |
Add the series or dataframe only operations to the cls ; evaluate the doc strings again. | def _add_series_or_dataframe_operations(cls):
"""
Add the series or dataframe only operations to the cls; evaluate
the doc strings again.
"""
from pandas.core import window as rwindow
@Appender(rwindow.rolling.__doc__)
def rolling(self, window, min_periods=None,... |
Retrieves the index of the first valid value. | def _find_valid_index(self, how):
"""
Retrieves the index of the first valid value.
Parameters
----------
how : {'first', 'last'}
Use this parameter to change between the first or last valid index.
Returns
-------
idx_first_valid : type of in... |
Reset cached properties. If key is passed only clears that key. | def _reset_cache(self, key=None):
"""
Reset cached properties. If ``key`` is passed, only clears that key.
"""
if getattr(self, '_cache', None) is None:
return
if key is None:
self._cache.clear()
else:
self._cache.pop(key, None) |
if arg is a string then try to operate on it: - try to find a function ( or attribute ) on ourselves - try to find a numpy function - raise | def _try_aggregate_string_function(self, arg, *args, **kwargs):
"""
if arg is a string, then try to operate on it:
- try to find a function (or attribute) on ourselves
- try to find a numpy function
- raise
"""
assert isinstance(arg, str)
f = getattr(sel... |
provide an implementation for the aggregators | def _aggregate(self, arg, *args, **kwargs):
"""
provide an implementation for the aggregators
Parameters
----------
arg : string, dict, function
*args : args to pass on to the function
**kwargs : kwargs to pass on to the function
Returns
-------
... |
return a new object with the replacement attributes | def _shallow_copy(self, obj=None, obj_type=None, **kwargs):
"""
return a new object with the replacement attributes
"""
if obj is None:
obj = self._selected_obj.copy()
if obj_type is None:
obj_type = self._constructor
if isinstance(obj, obj_type):
... |
Return the size of the dtype of the item of the underlying data. | def itemsize(self):
"""
Return the size of the dtype of the item of the underlying data.
.. deprecated:: 0.23.0
"""
warnings.warn("{obj}.itemsize is deprecated and will be removed "
"in a future version".format(obj=type(self).__name__),
... |
Return the base object if the memory of the underlying data is shared. | def base(self):
"""
Return the base object if the memory of the underlying data is shared.
.. deprecated:: 0.23.0
"""
warnings.warn("{obj}.base is deprecated and will be removed "
"in a future version".format(obj=type(self).__name__),
... |
The ExtensionArray of the data backing this Series or Index. | def array(self) -> ExtensionArray:
"""
The ExtensionArray of the data backing this Series or Index.
.. versionadded:: 0.24.0
Returns
-------
ExtensionArray
An ExtensionArray of the values stored within. For extension
types, this is the actual arr... |
A NumPy ndarray representing the values in this Series or Index. | def to_numpy(self, dtype=None, copy=False):
"""
A NumPy ndarray representing the values in this Series or Index.
.. versionadded:: 0.24.0
Parameters
----------
dtype : str or numpy.dtype, optional
The dtype to pass to :meth:`numpy.asarray`
copy : boo... |
The data as an ndarray possibly losing information. | def _ndarray_values(self) -> np.ndarray:
"""
The data as an ndarray, possibly losing information.
The expectation is that this is cheap to compute, and is primarily
used for interacting with our indexers.
- categorical -> codes
"""
if is_extension_array_dtype(se... |
Return the maximum value of the Index. | def max(self, axis=None, skipna=True):
"""
Return the maximum value of the Index.
Parameters
----------
axis : int, optional
For compatibility with NumPy. Only 0 or None are allowed.
skipna : bool, default True
Returns
-------
scalar
... |
Return an ndarray of the maximum argument indexer. | def argmax(self, axis=None, skipna=True):
"""
Return an ndarray of the maximum argument indexer.
Parameters
----------
axis : {None}
Dummy argument for consistency with Series
skipna : bool, default True
See Also
--------
numpy.ndarra... |
Return the minimum value of the Index. | def min(self, axis=None, skipna=True):
"""
Return the minimum value of the Index.
Parameters
----------
axis : {None}
Dummy argument for consistency with Series
skipna : bool, default True
Returns
-------
scalar
Minimum va... |
Return a ndarray of the minimum argument indexer. | def argmin(self, axis=None, skipna=True):
"""
Return a ndarray of the minimum argument indexer.
Parameters
----------
axis : {None}
Dummy argument for consistency with Series
skipna : bool, default True
Returns
-------
numpy.ndarray
... |
Return a list of the values. | def tolist(self):
"""
Return a list of the values.
These are each a scalar type, which is a Python scalar
(for str, int, float) or a pandas scalar
(for Timestamp/Timedelta/Interval/Period)
Returns
-------
list
See Also
--------
n... |
perform the reduction type operation if we can | def _reduce(self, op, name, axis=0, skipna=True, numeric_only=None,
filter_type=None, **kwds):
""" perform the reduction type operation if we can """
func = getattr(self, name, None)
if func is None:
raise TypeError("{klass} cannot perform the operation {op}".format(
... |
An internal function that maps values using the input correspondence ( which can be a dict Series or function ). | def _map_values(self, mapper, na_action=None):
"""
An internal function that maps values using the input
correspondence (which can be a dict, Series, or function).
Parameters
----------
mapper : function, dict, or Series
The input correspondence object
... |
Return a Series containing counts of unique values. | def value_counts(self, normalize=False, sort=True, ascending=False,
bins=None, dropna=True):
"""
Return a Series containing counts of unique values.
The resulting object will be in descending order so that the
first element is the most frequently-occurring element.
... |
Return number of unique elements in the object. | def nunique(self, dropna=True):
"""
Return number of unique elements in the object.
Excludes NA values by default.
Parameters
----------
dropna : bool, default True
Don't include NaN in the count.
Returns
-------
int
See Als... |
Memory usage of the values | def memory_usage(self, deep=False):
"""
Memory usage of the values
Parameters
----------
deep : bool
Introspect the data deeply, interrogate
`object` dtypes for system-level memory consumption
Returns
-------
bytes used
S... |
Return the argument with an initial component of ~ or ~user replaced by that user s home directory. | def _expand_user(filepath_or_buffer):
"""Return the argument with an initial component of ~ or ~user
replaced by that user's home directory.
Parameters
----------
filepath_or_buffer : object to be converted if possible
Returns
-------
expanded_filepath_or_buffer : an expanded filepa... |
Attempt to convert a path - like object to a string. | def _stringify_path(filepath_or_buffer):
"""Attempt to convert a path-like object to a string.
Parameters
----------
filepath_or_buffer : object to be converted
Returns
-------
str_filepath_or_buffer : maybe a string version of the object
Notes
-----
Objects supporting the fsp... |
If the filepath_or_buffer is a url translate and return the buffer. Otherwise passthrough. | def get_filepath_or_buffer(filepath_or_buffer, encoding=None,
compression=None, mode=None):
"""
If the filepath_or_buffer is a url, translate and return the buffer.
Otherwise passthrough.
Parameters
----------
filepath_or_buffer : a url, filepath (str, py.path.local o... |
Get the compression method for filepath_or_buffer. If compression = infer the inferred compression method is returned. Otherwise the input compression method is returned unchanged unless it s invalid in which case an error is raised. | def _infer_compression(filepath_or_buffer, compression):
"""
Get the compression method for filepath_or_buffer. If compression='infer',
the inferred compression method is returned. Otherwise, the input
compression method is returned unchanged, unless it's invalid, in which
case an error is raised.
... |
Get file handle for given path/ buffer and mode. | def _get_handle(path_or_buf, mode, encoding=None, compression=None,
memory_map=False, is_text=True):
"""
Get file handle for given path/buffer and mode.
Parameters
----------
path_or_buf :
a path (str) or buffer
mode : str
mode to open path_or_buf with
encodi... |
Wrap comparison operations to convert timedelta - like to timedelta64 | def _td_array_cmp(cls, op):
"""
Wrap comparison operations to convert timedelta-like to timedelta64
"""
opname = '__{name}__'.format(name=op.__name__)
nat_result = opname == '__ne__'
def wrapper(self, other):
if isinstance(other, (ABCDataFrame, ABCSeries, ABCIndexClass)):
re... |
Parameters ---------- array: list - like copy: bool default False unit: str default ns The timedelta unit to treat integers as multiples of. errors: { raise coerce ignore } default raise How to handle elements that cannot be converted to timedelta64 [ ns ]. See pandas. to_timedelta for details. | def sequence_to_td64ns(data, copy=False, unit="ns", errors="raise"):
"""
Parameters
----------
array : list-like
copy : bool, default False
unit : str, default "ns"
The timedelta unit to treat integers as multiples of.
errors : {"raise", "coerce", "ignore"}, default "raise"
H... |
Convert an ndarray with integer - dtype to timedelta64 [ ns ] dtype treating the integers as multiples of the given timedelta unit. | def ints_to_td64ns(data, unit="ns"):
"""
Convert an ndarray with integer-dtype to timedelta64[ns] dtype, treating
the integers as multiples of the given timedelta unit.
Parameters
----------
data : numpy.ndarray with integer-dtype
unit : str, default "ns"
The timedelta unit to treat... |
Convert a object - dtyped or string - dtyped array into an timedelta64 [ ns ] - dtyped array. | def objects_to_td64ns(data, unit="ns", errors="raise"):
"""
Convert a object-dtyped or string-dtyped array into an
timedelta64[ns]-dtyped array.
Parameters
----------
data : ndarray or Index
unit : str, default "ns"
The timedelta unit to treat integers as multiples of.
errors : ... |
Add DatetimeArray/ Index or ndarray [ datetime64 ] to TimedeltaArray. | def _add_datetime_arraylike(self, other):
"""
Add DatetimeArray/Index or ndarray[datetime64] to TimedeltaArray.
"""
if isinstance(other, np.ndarray):
# At this point we have already checked that dtype is datetime64
from pandas.core.arrays import DatetimeArray
... |
Return a dataframe of the components ( days hours minutes seconds milliseconds microseconds nanoseconds ) of the Timedeltas. | def components(self):
"""
Return a dataframe of the components (days, hours, minutes,
seconds, milliseconds, microseconds, nanoseconds) of the Timedeltas.
Returns
-------
a DataFrame
"""
from pandas import DataFrame
columns = ['days', 'hours', 'm... |
Add engine to the excel writer registry. io. excel. | def register_writer(klass):
"""
Add engine to the excel writer registry.io.excel.
You must use this method to integrate with ``to_excel``.
Parameters
----------
klass : ExcelWriter
"""
if not callable(klass):
raise ValueError("Can only register callables as engines")
engine... |
Convert Excel column name like AB to 0 - based column index. | def _excel2num(x):
"""
Convert Excel column name like 'AB' to 0-based column index.
Parameters
----------
x : str
The Excel column name to convert to a 0-based column index.
Returns
-------
num : int
The column index corresponding to the name.
Raises
------
... |
Convert comma separated list of column names and ranges to indices. | def _range2cols(areas):
"""
Convert comma separated list of column names and ranges to indices.
Parameters
----------
areas : str
A string containing a sequence of column ranges (or areas).
Returns
-------
cols : list
A list of 0-based column indices.
Examples
... |
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