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判断IP地址
# 0-199 200-255 # re_str = r'(1?[0-9]?[0-9]|2[0-5]{2})\.(1?[0-9]?[0-9]|2[0-5]{2})' \ # r'\.(1?[0-9]?[0-9]|2[0-5]{2})\.(1?[0-9]?[0-9]|2[0-5]{2})' re_str = r'((1?[0-9]?[0-9]|2[0-5]{2})\.){3}(1?[0-9]?[0-9]|2[0-5]{2})' result1 = re.fullmatch(re_str, '255.189.10.37') result2 = re.fullmatch(re_str, '256.189.89.9') print(result1) print(result2) 运行结果: <_sre.SRE_Match object; span=(0, 13), match='255.189.10.37'> None
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计算一个字符串中所有数字的和
re_str = r'\d+\.\d+|\d+' str1 = 'hello90abc 78sjh12.5' result1 = re.findall(re_str, str1) print(result1) sum1 = 0 for num in result1: sum1 += float(num) print(sum1) 运行结果: ['90', '78', '12.5'] 180.5
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验证输入的内容只能是汉字
re_str = r'[\u4e00-\u9fff]*' result1 = re.fullmatch(re_str, '我爱你') result2 = re.fullmatch(re_str, '我爱你1') print(result1) print(result2) 运行结果: <_sre.SRE_Match object; span=(0, 3), match='我爱你'> None
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验证电话号码
re_str = r'1\d{10}' result1 = re.fullmatch(re_str, '18323161310') print(result1) 运行结果: <_sre.SRE_Match object; span=(0, 11), match='18323161310'>
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简单的身份证号码验证
# 没有考虑闰年以及平年时以及每个月对应的天数 re_str = r'[1-8]{2}[0-9]{4}[1-2][8-9][1-9]{2}(0[1-9]|1[0-2])([0-2][1-9]|3[0-1])[0-9]{3}([0-9]|X|x)' result1 = re.fullmatch(re_str, '13048118970228211x') print(result1) 运行结果: <_sre.SRE_Match object; span=(0, 18), match='13048118970228211x'>
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