On Wed, Mar 23, 2016 at 11:17 PM, Steven D'Aprano <st...@pearwood.info> wrote:
> import os
> open('a123.junk', 'w')
> open('b123.junk', 'w')
> try:
> os.rename('a123.junk', 'b123.junk')
> except OSError as e:
> print(e.winerror) # Windows only
> print(e.errno)
> print(repr(e))
>
> os.unlink('a123.junk')
> os.unlink('b123.junk')
>
32-bit Python on 64-bit Windows 7 in a VirtualBox VM under Debian Testing.
Python 3.5.1 (v3.5.1:37a07cee5969, Dec 6 2015, 01:38:48) [MSC v.1900 32 bit (In
tel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> import os
>>> open('a123.junk', 'w')
<_io.TextIOWrapper name='a123.junk' mode='w' encoding='cp1252'>
>>> open('b123.junk', 'w')
<_io.TextIOWrapper name='b123.junk' mode='w' encoding='cp1252'>
>>> try:
... os.rename('a123.junk', 'b123.junk')
... except OSError as e:
... print(e.winerror) # Windows only
... print(e.errno)
... print(repr(e))
...
183
17
FileExistsError(17, 'Cannot create a file when that file already exists')
>>> os.unlink('a123.junk')
>>> os.unlink('b123.junk')
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
PermissionError: [WinError 32] The process cannot access the file because it is
being used by another process: 'b123.junk'
>>>
The last error is because _ is retaining the open file, so it hasn't
been closed. Entering any non-None expression allows the unlink.
ChrisA
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