Python dict.get（）引发了KeyError [英] Python dict.get() raises KeyError

问题描述

我在这里迷路了，Python 2.7，我有一个字典 mt ，我使用 get（）方法，它通过文档说：

I am getting lost here, Python 2.7, I have a dictionary mt, and I use the get() method, which by documentation says:

get（key [，default]）如果键位于
字典中，则返回键值，否则返回默认值。如果没有给出默认值，它默认为
无，因此该方法从不引发 KeyError 。

但我还是得到

 File "/home/ubuntu/subscription-workers/commands/dr/rebilling.py", line 48, in rebill
    if mt.get('is_rebill', 0) == 1:
 KeyError: 'is_rebill'

任何想法为什么？

mt 是一个普通的 dict ，有时没有密钥。

The mt is a normal dict, that sometimes does not have the key.

推荐答案

所以我把问题搞定了。在这段代码被放置到位之前，有一个这样的一个

So I nailed the problem down. Before this code was put in place there was this one

File "/home/ubuntu/subscription-workers/commands/dr/rebilling.py", line 48, in rebill
    if mt['is_rebill'] == 1:
KeyError: 'is_rebill'

问题是旧版本中有.pyc文件，但堆栈跟踪正在加载实际的代码。运行后

The problem was that there were .pyc files from the older version, but the stack trace was loading the actual code. After running

find . -name "*.pyc" -exec rm -rf {} \;

并重新加载应用程序的一切都很好，没有问题。

and reloading the app everything was fine and without problems.

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