[issue31581] Reduce the number of imports for functools

[Terry J. Reedy]

Terry J. Reedy <tjreedy at udel.edu> added the comment:

An option for deferred imports would be to leave a comment at the top where the import would otherwise be.  Example:

# import types, weakref  # Deferred to single_dispatch()

This accomplishes the PEP8 purpose of making all dependencies of the module visible at the top.

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nosy: +terry.reedy

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<https://bugs.python.org/issue31581>
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