[issue19209] Remove import copyreg from os module

[Christian Heimes]

Christian Heimes added the comment:

Exactly, the pickle module depends on the copyreg module. It's a submodule that acts as a registry for pickle-related lookups and hooks. My patch just moves the registration of these hooks out of the os module into the copyreg module.

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<http://bugs.python.org/issue19209>
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