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# Enable autocompletion and history. Originally from# http://igotgenes.blogspot.com/2009/01/tab-completion-and-history-in-python.html# but needed to tune it.import rlcompleterimport atexitimport os.pathclass IrlCompleter(rlcompleter.Completer):    def __init__(self, tab='    '):        self.tab = tab        self.completer = rlcompleter.Completer()    def complete(self, text, state):        if not readline.get_line_buffer().strip():            readline.insert_text(self.tab)            return None        else:            retval = self.completer.complete(text, state)            return retvaltry:    import readlineexcept ImportError:    print "Module readline not available, not enabling autocompletion."else:    readline.parse_and_bind("tab: complete")    readline.set_completer(IrlCompleter().complete)# Restore our command-line history, and save it when Python exits.history_path = os.path.expanduser('~/.pyhistory')if os.path.isfile(history_path):    readline.read_history_file(history_path)atexit.register(lambda x=history_path: readline.write_history_file(x))