36 lines
1.1 KiB
Python
36 lines
1.1 KiB
Python
#!/usr/bin/python
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# -*- coding: UTF-8 -*-
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is_match = False
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def rmatch(r_idx: int, m_idx: int, regex: str, main: str):
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global is_match
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if is_match:
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return
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if r_idx >= len(regex): # 正则串全部匹配好了
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is_match = True
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return
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if m_idx >= len(main) and r_idx < len(regex): # 正则串没匹配完，但是主串已经没得匹配了
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is_match = False
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return
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if regex[r_idx] == '*': # * 匹配1个或多个任意字符，递归搜索每一种情况
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for i in range(m_idx, len(main)):
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rmatch(r_idx+1, i+1, regex, main)
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elif regex[r_idx] == '?': # ? 匹配0个或1个任意字符，两种情况
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rmatch(r_idx+1, m_idx+1, regex, main)
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rmatch(r_idx+1, m_idx, regex, main)
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else: # 非特殊字符需要精确匹配
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if regex[r_idx] == main[m_idx]:
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rmatch(r_idx+1, m_idx+1, regex, main)
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if __name__ == '__main__':
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regex = 'ab*eee?d'
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main = 'abcdsadfkjlekjoiwjiojieeecd'
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rmatch(0, 0, regex, main)
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print(is_match)
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