[issue4290] 2to3 fails with sympy

[STINNER Victor]

STINNER Victor <victor.stinner at haypocalc.com> added the comment:

You would like to replace "from mptypes import ..." by "from .mptypes 
import ...". Is it really a bug? Python is unable to guess if mptypes, 
functions or settings are "global" modules or "relative" modules. Why 
don't you patch your original code since Python 2.5 also supports this 
syntax? Documentation:
http://www.python.org/doc/2.5.2/ref/import.html
http://docs.python.org/reference/simple_stmts.html#the-import-statement

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nosy: +haypo

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