import redef name_of_email(addr): re_email = re.compile(r'(\<?)([a-zA-Z\s]+)(\>\s)?([a-z]*)@([a-z]+)(\.org|com)$') if re_email.match(addr): return re_email.match(addr).group(2) else: return None# 测试:assert name_of_email('<Tom Paris> tom@voyager.org') == 'Tom Paris'assert name_of_email('tom@voyager.org') == 'tom'print('ok')
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