[issue9104] test_exceptions does not test pickling with pickle.py
report at bugs.python.org
Thu Jul 1 18:18:35 CEST 2010
Antoine Pitrou <pitrou at free.fr> added the comment:
> > You can make the dictionary values as lists for the 'blocked'
> > argument for import_fresh_module(). That would work [for io].
> I don't understand how having multiple modules in the blocked list
> will help in io case. io.py will simply not work if _io is blocked.
Which you avoid by giving an empty list of blocked modules, using
> I don't like that approach because it makes pure python code hard to
Ok, but this code exists and it would be much better if it were
> The io/_pyio approach also prevents io.py from bring used by
> alternative python implementations unmodified.
It would be foolish to use it unmodified anyway, unless you like
low-speed I/O (and a JIT isn't a magic bullet).
The reason this was done like this is that the io module is imported at
startup: we want to avoid unnecessary parsing of extraneous code (and
unnecessary importing additional dependencies), and we also want to
reduce opportunities for failing to initialize the standard I/O streams
> This will not solve the io issue, but will add some flexibility.
Which is pointless unless such flexibility is needed by someone.
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