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Date: Wed, 16 Nov 2011 18:46:30 -0500
Subject: Re: python shell that saves history of typed in commands that will persist between reboots
From: David Robinow <drobinow@gmail.com>
To: Ben Finney <ben+python@benfinney.id.au>
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Xref: x330-a1.tempe.blueboxinc.net comp.lang.python:15793

On Wed, Nov 16, 2011 at 4:09 PM, Ben Finney <ben+python@benfinney.id.au> wr=
ote:
> goldtech <goldtech@worldpost.com> writes:
>
>> Using Windows. Is there a python shell that has a history of typed in
>> commands?
>
> I don't know about MS Windows, but the Python interactive shell can be
> linked with the GNU Readline library for managing its command line
> <URL:http://docs.python.org/library/readline.html> including editing
> features, tab completion, history management, and a persistent history
> file.
>
> You can then use that functionality in your Python interactive startup
> file. Here's mine:
>
> =3D=3D=3D=3D=3D
> # $HOME/.pythonrc
> # User configuration for interactive Python shell.
>
> import sys
> import os
> import os.path
> import atexit
>
> # Tab completion with readline.
> # Cribbed from <URL:http://docs.python.org/lib/module-rlcompleter.html>.
> try:
> =A0 =A0import readline
> except ImportError:
> =A0 =A0sys.stderr.write("Module readline not available.\n")
> else:
> =A0 =A0import rlcompleter
>
> =A0 =A0# Enable tab completion.
> =A0 =A0readline.parse_and_bind("tab: complete")
>
> =A0 =A0# Persistent command history.
> =A0 =A0histfile =3D os.path.join(os.environ["HOME"], ".python_history")
> =A0 =A0try:
> =A0 =A0 =A0 =A0readline.read_history_file(histfile)
> =A0 =A0except IOError:
> =A0 =A0 =A0 =A0# Existing history file can't be read.
> =A0 =A0 =A0 =A0pass
> =A0 =A0atexit.register(readline.write_history_file, histfile)
>
> =A0 =A0del histfile
>
> del sys, os, atexit
>
> =3D=3D=3D=3D=3D
>
> Reading the documentation, I see that the =91readline=92 library is only
> linked with Python on Unix-alike operating systems. Yet another reason
> why MS Windows is not a good choice for developing software I guess.

 I'm not sure what documentation you're reading, but your code works fine o=
n
 Windows.   Thanks.  [It is necessary to properly set PYTHONSTARTUP]