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s1 = "1234" print(int(s1)) ## 1234 s2 = '1234a' #print(int(s2)) ## ValueError: invalid literal for int() with base 10: '1234a' # 先判断数据类型 if s2.isdigit(): print(int(s2)) else: print('s2不是数字,无法转换') # 捕捉异常 try: print(int('223aaa')) except Exception as e: print('223aaa不是数字,无法转换') print(e)
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