Separates a list of strings with the given separator.

separated-list.py

def sep(text_list, mid_sep=', ', last_sep=' and '):
    """
    Separates a list of strings or unicode with the given separator,
    adding a different separator at the end.

    This allows the simple generation of strings such as:

    "A, B, C and D"

    >>> sep([])
    ''
    >>> sep(['A'])
    'A'
    >>> sep(['A', 'B'])
    'A and B'
    >>> sep(['A', 'B', 'C'])
    'A, B and C'
    >>> sep(['A', 'B', 'C'], "; ")
    'A; B and C'
    >>> sep(['A', 'B', 'C'], last_sep=" et ")
    'A, B et C'
    >>> sep(['A', 'B', 'C'], mid_sep="; ", last_sep=" et ")
    'A; B et C'
    """
    num_list = len(text_list)
    if num_list == 0: return ''
    if num_list == 1: return text_list[0]
    if num_list == 2: return last_sep.join(text_list)
    else:
        return last_sep.join([mid_sep.join(text_list[:-1])] + text_list[-1:])

if __name__ == '__main__':
    import doctest
    doctest.testmod()