NameError: name 'FileNotFoundError' is not defined的解决方案

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NameError: name 'FileNotFoundError' is not defined的解决方案

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处理文件不存在使用FileNotFoundError来处理异常

python版本：2.7

python代码：

filename='waiwai.txt' try: with open(filename) as f_obj: contents=f_obj.read() except FileNotFoundError: print "Sorry,the file does't exist."

运行结果：

Traceback (most recent call last): File "J:/Python/821_03.py", line 5, in except FileNotFoundError: NameError: name 'FileNotFoundError' is not defined Process finished with exit code 1

报错原因：

FileNotFoundError为python3使用的文本不存在异常处理方法

在python2.7中使用IOError

修改后的python代码

filename='waiwai.txt' try: with open(filename) as f_obj: contents=f_obj.read() except IOError: print "Sorry,the file does't exist." 运行结果：

Sorry,the file does't exist. Process finished with exit code 0

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NameError: name 'FileNotFoundError' is not defined的解决方案

NameError: name 'FileNotFoundError' is not defined的解决方案

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