sys.path在哪里被替换？ [英] Where does sys.path get replaced?

问题描述

某些图书馆以我不想要的方式更改我的 sys.path 。

Some library does change my sys.path in a way that I don't want it to.

但是我找不到它。受影响的virtualenv安装了很多库。

But I can't find it. The affected virtualenv has a lot of libraries installed.

我用一个改变了修改的类替换了sys.path，但这并没有帮助，因为代码似乎更改 sys.path 如下所示：

I replaced sys.path with a own class which alters the modifications, but this does not help, since the code seems to alter sys.path like this:

sys.path= [...] + sys.path

我如何找到恶代码行及其堆栈跟踪？

How can I find the "evil" code line and its stack trace?

相关

• 调试sys.path 的修改

• Debugging modifications of sys.path

推荐答案

我发现这样的恶意代码行。

I found the evil code line like this.

我改变了sys.globals ['sys' ]在sitecustomize.py：

I alter sys.globals['sys'] in sitecustomize.py:

# sitecustomize.py
import sys

class AttributeIsReadonly(ValueError):
    pass

class MakeModuleAttributesReadonly(object):
    def __init__(self, module, readonly_attributes):
        self.module=module
        self.readonly_attributes=readonly_attributes

    def __setattr__(self, item, value):
        if item in ['module', 'readonly_attributes']:
            return super(MakeModuleAttributesReadonly, self).__setattr__(item, value)
        if item in self.readonly_attributes:
            raise AttributeIsReadonly('Access on attribute %r is readonly' % item)
        return setattr(self.module, item, value)

    def __getattr__(self, item):
        return getattr(self.module, item)

sys.modules['sys']=MakeModuleAttributesReadonly(sys, ['path'])

#import sys
#sys.path=sys.path # this will raise the above AttributeIsReadonly

它引发 AttributeIsReadonly ，我看到代码行堆栈跟踪。

It raises AttributeIsReadonly and I see the code line and the stack trace.

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