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python:UnboundLocalError:赋值前引用的局部变量 'open'

转载 作者:行者123 更新时间:2023-11-28 19:33:35 26 4
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def read_lines():
readFileName = "readfile.txt"
f = open(readFileName, 'r+')
contents = f.read()
... # and so on

read_lines()

当我运行它时,出现错误:

f = open(readFileName, 'r+')
UnboundLocalError: local variable 'open' referenced before assignment

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