OpenQuizz
Une application de gestion des contenus pédagogiques
pyrsistent._toolz Namespace Reference

Functions

def get_in (keys, coll, default=None, no_default=False)
 

Detailed Description

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.
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     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
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Function Documentation

◆ get_in()

def pyrsistent._toolz.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'