Message177099
I checked on Windows 7 64bit with python 2.7 (sorry, not python 3.3 installed here) with the script attached. Each line sets a variable using the method in the very left column, then it attempts to read it back using all methods.
os.environ win32 os.?etenv msvcrt msvcr?
os.environ OK OK OK -- --
win32 -- OK -- -- --
os.?etenv -- OK -- -- --
msvcrt -- OK -- OK --
msvcr? -- OK -- -- --
Methods which can read back what they also set are os.environ, win32api, msvcrt. OTOH, msvcr? (which is ctypes.util.find_msvcr(), in my case msvcr90.dll) does not read its own values, just like os.getenv/os.putenv.
It *seems* that reading with win32 API is very reliable (that is not a good news for writing cross-platform extension modules), though, but perhaps it just asks the CRT if it does not find the variable defined (my testing did not go that far).
@Andrew: you're probably right, though it does not explain, why msvcr90.dll does not read back the values I set in there - that is the CRT python27.dll itself links to -- |
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Date |
User |
Action |
Args |
2012-12-07 17:11:50 | eudoxos | set | recipients:
+ eudoxos, tim.golden, asvetlov, docs@python |
2012-12-07 17:11:50 | eudoxos | set | messageid: <1354900310.58.0.891014642915.issue16633@psf.upfronthosting.co.za> |
2012-12-07 17:11:50 | eudoxos | link | issue16633 messages |
2012-12-07 17:11:50 | eudoxos | create | |
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