Simple history function like bash history but for python interactive/repl.

repl_history.py

# Simple history function like bash history but for python interactive/repl.
def history( num=0 ):
    import readline
    len = readline.get_current_history_length()
    if( num>0 ):
       num=len-num
    for i in range(num,len):
        print( i,readline.get_history_item(i + 1) )  
        
# Later attemps at the same thing: Cygwin setup of Python REPL
  # Define the interactive config file:
  #  echo 'export PYTHONCONFIG=~/.pythonrc' >> ~/.bashrc
  # Defined a simple one at first: ~/.pythonrc
    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
  # But decided to try ptpython instead: ~/.pythonrc
    import sys
    try:
        from ptpython.repl import embed
    except ImportError:
        print("ptpython is not available: falling back to standard prompt")
    else:
        sys.exit(embed(globals(), locals()))
  # The ptpython one seems to be working well... So far.