Autocomplete with readline in python3

Question

I'm trying to use this nifty trick here to work with a csv file. I can't seem to get autocomplete working in python3 though. I don't know where to begin with readline. The documentation was a little dense. My guess is that I'm missing something without raw_input() from Python 2.

I've pasted my attempt below. When I'm in the shell and I hit tab, I just get big tabs and no autocomplete action. My intention is that the input statement below auto-completes on the strings ['10/10/2013', '10/13/2013', '10/14/2013', '10/15/2013'].

What am I missing?

import readline

class MyCompleter(object):  # Custom completer

    def __init__(self, options):
        self.options = sorted(options)

    def complete(self, text, state):
        if state == 0:  # on first trigger, build possible matches
            if text:  # cache matches (entries that start with entered text)
                self.matches = [s for s in self.options
                                    if s and s.startswith(text)]
            else:  # no text entered, all matches possible
                self.matches = self.options[:]

        # return match indexed by state
        try:
            return self.matches[state]
        except IndexError:
            return None


dates = [
    '10/10/2013 13:03:51',
    '10/10/2013 13:54:32',
    '10/10/2013 18:48:48',
    '10/10/2013 19:13:00',
    '10/13/2013 12:58:17',
    '10/13/2013 13:38:15',
    '10/13/2013 16:48:58',
    '10/13/2013 17:23:59',
    '10/13/2013 20:09:56',
    '10/13/2013 21:54:14',
    '10/13/2013 21:57:43',
    '10/13/2013 22:47:40',
    '10/14/2013 13:32:53',
    '10/14/2013 21:14:51',
    '10/15/2013 10:18:23'
    ]

dates = [x.split(' ')[0] for x in dates]

completer = MyCompleter(list(set(dates)))
readline.set_completer(completer.complete)
readline.parse_and_bind('tab: complete')
date = input('Enter a date in m/d/yy format
	')

Update: Nice answer below, but still broken for me on OS X. I don't even know where to begin troubleshooting that. I get autocomplete with this on Ubuntu, but it's not binding to tab on my OS X system somehow.

Autocomplete with readline in python3

1 Answers