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Issue #17177: Update the programming FAQ to use importlib

This commit is contained in:
Brett Cannon 2013-06-14 22:49:00 -04:00
parent 82b3d6ae93
commit 4f422e3414
1 changed files with 5 additions and 5 deletions
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10
Doc/faq/programming.rst
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@ -1738,12 +1738,12 @@ When I edit an imported module and reimport it, the changes don't show up. Why
For reasons of efficiency as well as consistency, Python only reads the module
file on the first time a module is imported. If it didn't, in a program
consisting of many modules where each one imports the same basic module, the
basic module would be parsed and re-parsed many times. To force rereading of a
basic module would be parsed and re-parsed many times. To force re-reading of a
changed module, do this::
import imp
import importlib
import modname
imp.reload(modname)
importlib.reload(modname)
Warning: this technique is not 100% fool-proof. In particular, modules
containing statements like ::
@ -1755,10 +1755,10 @@ module contains class definitions, existing class instances will *not* be
updated to use the new class definition. This can result in the following
paradoxical behaviour:
>>> import imp
>>> import importlib
>>> import cls
>>> c = cls.C() # Create an instance of C
>>> imp.reload(cls)
>>> importlib.reload(cls)
<module 'cls' from 'cls.py'>
>>> isinstance(c, cls.C) # isinstance is false?!?
False