Password retrieval from password-store or a custom store.

password_store.py

import collections
import os
import subprocess

class Entry(collections.namedtuple('Entry', 'username, password, url')):
    """ 
    An Entry object represents an entry in the password store.
    """
    def __new__(cls, username, password, url=None):
        """Create a new Entry object
        
        Arguments:
            username: a username
            password: a password
            url: a URL associated with the account (optional)
            
        """
        return super(Entry, cls).__new__(cls, username, password, url)


class PasswordStore(object):
    def retrieve(self, account):
        """Returns the an entry for the specified account

        """
        result = subprocess.check_output("pass {}".format(account), shell=True)
        lines = [r.strip() for r in result.splitlines()]

        lookup = {}
        for line in lines:
            try:
                key, val = line.split(':', 1)
                lookup[key.strip()] = val.strip()
            except Exception:
                pass

        return Entry(
                lookup['username'],
                lookup['password'],
                lookup.get('url', None),
                )   


class CustomStore(object):
    def __init__(self):
        self.storedir = os.path.expanduser('~/.password-store')

    def retrieve(self, account):
        result = subprocess.check_output(
                "gpg --use-agent --no-tty -d {}/{}.gpg".format(self.storedir, account),
                stderr=subprocess.PIPE,
                shell=True,
                )   

        lines = [r.strip() for r in result.splitlines()]

        lookup = {}
        for line in lines:
            try:
                key, val = line.split(':', 1)
                lookup[key.strip()] = val.strip()
            except Exception:
                pass

        return Entry(
                lookup['username'],
                lookup['password'],
                lookup.get('url', None),
                )