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Utility functions to convert strings to Python types

Project description


Utility functions to convert strings to Python types.


Converts base64 encoded strings or bytes into strings:

>>> from conversion import convert_base64
>>> convert_base64('dGVzdA==')

If the payload is expected to be bytes, string conversion can be suppressed:

>>> convert_base64('dGVzdA==', convert_string=False)

When the function does not find the string can be converted, an exception can be raised:

>>> convert_base64('dGVzdA=', raise_exceptions=True)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/Users/berto/Projects/home/conversion/conversion/", line 28, in convert_base64
    converted = base64.b64decode(value)
  File "/Users/berto/.local/share/virtualenvs/conversion-bncB6LgQ/lib/python3.6/", line 87, in b64decode
    return binascii.a2b_base64(s)
binascii.Error: Incorrect padding


Converts truthy strings to True and falsey strings to False:

>>> from conversion import convert_bool
>>> convert_bool('yes')
>>> convert_bool('no')

When the function does not find the string can be converted, ValueError is raised:

>>> convert_bool('yup')
ValueError: invalid truth value 'yup'


Converts time with unit suffixes into datetime.timedelta objects:

>>> from conversion import convert_delta
>>> convert_delta('1h')
datetime.timedelta(0, 3600)


Converts JSON strings into objects:

>>> from conversion import convert_json
>>> convert_json('{"some": "dict", "in": "json"}')
{'some': 'dict', 'in': 'json'}


Converts a comma-delimited string into a list:

>>> from conversion import convert_list
>>> convert_list('a,comma,delimited,list')
['a', 'comma', 'delimited', 'list']

And an optional kwarg can specify the delimiter:

>>> convert_list('a:colon:delimited:list', delimiter=':')
['a', 'colon', 'delimited', 'list']

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