numbers.py have a bug!!
*Created originally on Bitbucket by [4744020502 (eson)](https://bitbucket.org/%7B36a19536-5cff-47b4-8a68-52a2a2771298%7D/)* ``` #!python def is_date_format(fmt): if fmt is None: return False fmt = fmt.lower() if any([x in fmt for x in DATE_INDICATORS]): return not BAD_DATE_RE.search(fmt) return False ``` ``` #!python if any([x in fmt for x in DATE_INDICATORS]): return not BAD_DATE_RE.search(fmt) that lead to incorrect return ``` eg: fmt = m"M"d"D";@ (m"月"d"日";@ extract from my excel file)
issue