How to repeat last command in python interpreter shell?


Question

How do I repeat the last command? The usual keys: Up, Ctrl+Up, Alt-p don't work. They produce nonsensical characters.

(ve)[kakarukeys@localhost ve]$ python
Python 2.6.6 (r266:84292, Nov 15 2010, 21:48:32) 
[GCC 4.4.4 20100630 (Red Hat 4.4.4-10)] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> print "hello world"
hello world
>>> ^[[A
  File "<stdin>", line 1
    ^
SyntaxError: invalid syntax
>>> ^[[1;5A
  File "<stdin>", line 1
    [1;5A
    ^
SyntaxError: invalid syntax
>>> ^[p
  File "<stdin>", line 1
    p
    ^
SyntaxError: invalid syntax
>>> 
1
117
11/22/2013 6:39:20 PM

Accepted Answer

I use the following to enable history on python shell.

This is my .pythonstartup file . PYTHONSTARTUP environment variable is set to this file path.

# python startup file 
import readline 
import rlcompleter 
import atexit 
import os 
# tab completion 
readline.parse_and_bind('tab: complete') 
# history file 
histfile = os.path.join(os.environ['HOME'], '.pythonhistory') 
try: 
    readline.read_history_file(histfile) 
except IOError: 
    pass 
atexit.register(readline.write_history_file, histfile) 
del os, histfile, readline, rlcompleter

You will need to have the modules readline, rlcompleter to enable this.

Check out the info on this at : http://docs.python.org/using/cmdline.html#envvar-PYTHONSTARTUP.

Modules required:

  1. http://docs.python.org/library/readline.html
  2. http://docs.python.org/library/rlcompleter.html
50
11/27/2010 3:41:18 AM

In IDLE, go to Options -> Configure IDLE -> Keys and there select history-next and then history-previous to change the keys.

Then click on Get New Keys for Selection and you are ready to choose whatever key combination you want.


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