How to use 'how to take comma separated input in python' in Python

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def convert_list_comma(s):
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    """
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    Return a list object from the <s>.
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    Consider <s> is comma delimited.
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    """
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    if s is None:
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        return []
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    if isinstance(s, list):
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        return s
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    return [word for word in re.split(r"\s*,\s*", s.strip()) if word != ""]</s></s>

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def comma_list(list_str, item_func=None):
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    if not list_str:
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        raise ArgumentTypeError("Invalid comma list")
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    item_func = item_func or (lambda i: i)
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    return [item_func(i.strip()) for i in list_str.split(",") if i.strip()]