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File Content: `_toolz.py`

"""
Functionality copied from the toolz package to avoid having
to add toolz as a dependency.

See https://github.com/pytoolz/toolz/.

toolz is relased under BSD licence. Below is the licence text
from toolz as it appeared when copying the code.

--------------------------------------------------------------

Copyright (c) 2013 Matthew Rocklin

All rights reserved.

Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are met:

  a. Redistributions of source code must retain the above copyright notice,
     this list of conditions and the following disclaimer.
  b. Redistributions in binary form must reproduce the above copyright
     notice, this list of conditions and the following disclaimer in the
     documentation and/or other materials provided with the distribution.
  c. Neither the name of toolz nor the names of its contributors
     may be used to endorse or promote products derived from this software
     without specific prior written permission.


THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR
ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH
DAMAGE.
"""
import operator
from six.moves import reduce


def get_in(keys, coll, default=None, no_default=False):
    """
    NB: This is a straight copy of the get_in implementation found in
        the toolz library (https://github.com/pytoolz/toolz/). It works
        with persistent data structures as well as the corresponding
        datastructures from the stdlib.

    Returns coll[i0][i1]...[iX] where [i0, i1, ..., iX]==keys.

    If coll[i0][i1]...[iX] cannot be found, returns ``default``, unless
    ``no_default`` is specified, then it raises KeyError or IndexError.

    ``get_in`` is a generalization of ``operator.getitem`` for nested data
    structures such as dictionaries and lists.
    >>> from pyrsistent import freeze
    >>> transaction = freeze({'name': 'Alice',
    ...                       'purchase': {'items': ['Apple', 'Orange'],
    ...                                    'costs': [0.50, 1.25]},
    ...                       'credit card': '5555-1234-1234-1234'})
    >>> get_in(['purchase', 'items', 0], transaction)
    'Apple'
    >>> get_in(['name'], transaction)
    'Alice'
    >>> get_in(['purchase', 'total'], transaction)
    >>> get_in(['purchase', 'items', 'apple'], transaction)
    >>> get_in(['purchase', 'items', 10], transaction)
    >>> get_in(['purchase', 'total'], transaction, 0)
    0
    >>> get_in(['y'], {}, no_default=True)
    Traceback (most recent call last):
        ...
    KeyError: 'y'
    """
    try:
        return reduce(operator.getitem, keys, coll)
    except (KeyError, IndexError, TypeError):
        if no_default:
            raise
        return default

Name	Size	Permission
__pycache__	---	0755
__init__.py	1479 bytes	0644
__init__.pyi	5046 bytes	0644
_checked_types.py	18312 bytes	0644
_compat.py	521 bytes	0644
_field_common.py	10804 bytes	0644
_helpers.py	2475 bytes	0644
_immutable.py	3559 bytes	0644
_pbag.py	6754 bytes	0644
_pclass.py	9398 bytes	0644
_pdeque.py	12184 bytes	0644
_plist.py	8282 bytes	0644
_pmap.py	14643 bytes	0644
_precord.py	6574 bytes	0644
_pset.py	5718 bytes	0644
_pvector.py	22731 bytes	0644
_toolz.py	3427 bytes	0644
_transformations.py	3583 bytes	0644
py.typed	0 bytes	0644
typing.py	1415 bytes	0644
typing.pyi	7030 bytes	0644

File Content: _toolz.py

File Content: `_toolz.py`