Tony Meyer wrote:
> Is this the intended behaviour?

Sort-of. os.rename invokes the C library's rename, and does whatever
this does. It is expected that most platform's C libraries do what
the documentation says rename does, but platforms may vary in their
implementation of the C library, and from one compiler version to
the other.

Microsoft's documentation of rename/_rename/_wrename is here:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/vclib/html/_crt_rename.2c_._wrename.asp

It doesn't say anything about renaming in-use files, either.
Looking at the implementation of _rename, I see that it directly
calls MoveFile, which is documented here:

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/fileio/fs/movefile.asp

That doesn't mention the in-use case, either.

Regards,
Martin
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