"""
Commonly useful converters.
"""
from __future__ import absolute_import, division, print_function
def optional(converter):
"""
A converter that allows an attribute to be optional. An optional attribute
is one which can be set to ``None``.
:param callable converter: the converter that is used for non-``None``
values.
.. versionadded:: 17.1.0
"""
def optional_converter(val):
if val is None:
return None
return converter(val)
return optional_converter
| Name | Type | Size | Permission | Actions |
|---|---|---|---|---|
| __pycache__ | Folder | 0755 |
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| __init__.py | File | 1.13 KB | 0644 |
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| _compat.py | File | 4.19 KB | 0644 |
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| _config.py | File | 514 B | 0644 |
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| _funcs.py | File | 7.71 KB | 0644 |
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| _make.py | File | 48.14 KB | 0644 |
|
| converters.py | File | 531 B | 0644 |
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| exceptions.py | File | 1.08 KB | 0644 |
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| filters.py | File | 1.12 KB | 0644 |
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| validators.py | File | 4.84 KB | 0644 |
|