为什么Python给我“需要整数"?什么时候不应该? [英] Why is Python giving me "an integer is required" when it shouldn't be?

问题描述

我的Python程序中有一个保存函数，如下所示:

I have a save function within my Python program which looks like this:

def Save(n):
    print("S3")
    global BF
    global WF
    global PBList
    global PWList
    print(n)
    File = open("C:\KingsCapture\Saves\\" + n + "\BF.txt", "w")
    pickle.dump(BF, File)
    File = open("C:\KingsCapture\Saves\\" + n + "\WF.txt", "w")
    pickle.dump(WF, File)
    File = open("C:\KingsCapture\Saves\\" + n + "\PBList.txt", "w")
    pickle.dump(PBList, File)
    File = open("C:\KingsCapture\Saves\\" + n + "\PWList.txt", "w")
    pickle.dump(PWList, File)

在这里，n为"1".

我看到这样的错误:

  File "C:/Python27/KingsCapture.py", line 519, in Save
    File = open("C:\KingsCapture\Saves\\" + n + "\BF.txt", "w")
TypeError: an integer is required

在外壳中执行相同的加载后，我没有出现任何错误:

Upon doing the same loading within the shell, I get no errors:

>>> File = open("C:\KingsCapture\Test\List.txt", "r")
>>> File = open("C:\KingsCapture\Test\List.txt", "w")
>>> n = "1"
>>> File = open("C:\KingsCapture\Saves\\" + n + "\BF.txt", "r")
>>> File = open("C:\KingsCapture\Saves\\" + n + "\BF.txt", "w")

为什么会有问题?

推荐答案

您可能从os模块中导入了星号:

You probably did a star import from the os module:

>>> open("test.dat","w")
<open file 'test.dat', mode 'w' at 0x1004b20c0>
>>> from os import *
>>> open("test.dat","w")
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
TypeError: an integer is required

因此您使用了错误的打开功能. (我想您可以简单地完成from os import open，但这不太可能.)通常应避免这种导入样式，在可行的情况下也应避免使用global.

so you're using the wrong open function. (I suppose you could've simply done from os import open, but that's less likely.) In general this import style should be avoided, as should use of global, where practical.

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