Python:防止模块导入时混合使用制表符/空格 [英] Python: prevent mixed tabs/spaces on module import

问题描述

我知道您可以通过使用-tt调用Python来确保纯制表符/空格代码.但是，当我无法控制顶级调用时，是否仍可以在脚本加载的模块上强制执行此行为?

I know you can ensure pure tabbed/spaced code by calling Python with -tt. However, when I have no control over the top-level call, can I still enforce this behaviour on the modules that are loaded by my script?

推荐答案

如果您可以控制初始脚本，则可以自己添加一个检查.例如，不仅可以导入学生的脚本，还可以使用一个函数，该函数首先检查模块是否存在缩进错误，然后然后导入它:

If you have control about the initial script, then you can just add a check for it yourself. For example, instead of just importing your student’s script, you could have a function that first checks the module for indentation errors, and then imports it:

# instead of
import foo
foo.bar()

# you have something like
foo = verifyAndImport('foo')
foo.bar()

verifyAndImport看起来像这样:

import importlib
def verifyAndImport (moduleName):
    with open(moduleName + '.py') as f:
        # TODO: logic to verify consistent indentation

    return importlib.import_module(moduleName)

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另一种解决方案是让您的初始脚本在新的Python进程中使用-tt参数启动 actual 脚本.但是，正如tdelaney指出的那样，这可能会导致不是您的学生造成的错误.

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An alternative solution would be to have your initial script launch the actual script in a new Python process, with the -tt argument. But as tdelaney pointed out, this may cause errors that are not caused by your students.

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