Return the singular or plural form of text

pluralize.py

def pluralize(count, arg1=None, arg2=None):
    """Return pluralized string.

    If the count is 1, then if two additional arguments are provided, return the
    first one. Otherwise, return an empty string.

    if the count is not 1, then if two additional arguments are provided, return
    the second one.  If one additional argument is provided, return it.
    Otherwise return "s".

    Example usages:

      '%d cat%s.' % (count, pluralize(count))
      '%d walrus%s' % (count, pluralize(count, 'es'))
      '%d cherr%s' % (count, pluralize(count, 'y', 'ies'))
    """ 
    if count == 1:
        if arg2 is not None:
            return arg1
        else:
            return ""
    else:
        if arg2 is not None:
            return arg2
        elif arg1 is not None:
            return arg1
        else:
            return "s"