CSV helper for python-decouple

gistfile1.py

"""
Example:

>>> csv = Csv()
>>> csv('127.0.0.1, .localhost, .herokuapp.com')
['127.0.0.1', '.localhost', '.herokuapp.com']

>>> csv = Csv(int)
>>> csv('1,2,3,4,5')
[1, 2, 3, 4, 5]

>>> csv = Csv(cast=lambda s: s.upper(), delimiter='\t', strip=' %*')
>>> csv('%virtual_env%\t *important stuff*\t   trailing spaces   ')
['VIRTUAL_ENV', 'IMPORTANT STUFF', 'TRAILING SPACES']
"""


def __init__(self, cast=text_type, delimiter=', \t\r\n', strip=string.whitespace):
        """
        Parameters:
        cast -- callable that transforms the item just before it's added to the list.
        delimiter -- string of delimiters chars passed to shlex.
        strip -- string of non-relevant characters to be passed to str.strip after the split.
        """
        self.cast = cast
        self.delimiter = delimiter
        self.strip = strip

    def __call__(self, value):
        """The actual transformation"""
        transform = lambda s: self.cast(s.strip(self.strip))

        splitter = shlex(value, posix=True)
        splitter.whitespace = self.delimiter
        splitter.whitespace_split = True

        return [transform(s) for s in splitter]

Também acho que usar só ',' seja melhor.