paul j3 added the comment:
The problem with Python2.7 is that 'open' does not take 'closefd', or any of
the other parameters that were added for Python3.
open(name[, mode[, buffering]])
'rb' may make a difference on Py2 on Windows, but I haven't done any work in
the environment in a long time.
I wasn't aware of that other issue. Some core Python developers have
participated in that one. I suspect a lot of the discussion is beyond my level
of expertise.
I once wrote that I thought 'FileType' was included primarily as an example of
a 'type' factory. Something users could copy and extend for their own use.
Bethard corrected me, saying that it was meant for quick-n-dirty script uses,
ones with an input file, output file and a few options. In a bigger scripts,
the users are encouraged to open/close files in 'with' contexts.
See http://bugs.python.org/issue22884 and the issues I reference there.
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<http://bugs.python.org/issue14156>
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