[Tutor] trouble using 2to3.py
davea at ieee.org
Tue Nov 3 22:16:35 CET 2009
Richard D. Moores wrote:
> On Tue, Nov 3, 2009 at 05:30, Dave Angel <davea at ieee.org> wrote:
>> Easiest way to know which python is being used is to run it same way:
>> e:\python31\temp> python 2to3.py -w mycalc.py
>> Or the way I do it, have python31.bat and python26.bat, which launch the
>> exact pythons that I want.
> Thanks, Dave. I'm not familiar with .bat files. Could you give me a
> look at one of them?
A batch file is Windows (much dummyfied) version of Unix script files.
It's a "program" interpreted by CMD.EXE, the shell processor for a
"Command Prompt". Anyway, it's usually not much more than a list of
programs to run, with their arguments. In our case, we just want to run
a particular python.exe in a particular path, with whatever arguments
were passed to the batch file. So mine are one line each, and look like:
Obviously, yours will be different, unless you happened to pick the same
install path as I did. The %* magic just means copy the rest of the
original command line.
You run these something like:
m:\myscripts\ready > python31 myprogram.py
to explicitly run python31 on the python script, myprogram.py
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