4 ways to parse a passwd file in Python

### 1 (6 lines)

def passwd_data(filename):
    fields='username:password:uid:gid:fullname:homedir:shell'.split(':')
    FILE = open(filename, "r")
    passwdfile=[y.strip() for y in FILE.readlines()]
    FILE.close()
    return [dict(zip(fields, line.split(':'))) for line in passwdfile]

### 2 (9 lines, but stripallf is a generic, reusable function)
def stripallf(filename):
    FILE = open(filename, "r")
    lines=[y.strip() for y in FILE.readlines()]
    FILE.close()
    return lines

def passwd_data2(filename):
    return [dict(zip('username:password:uid:gid:fullname:homedir:shell'.split(':'),
                     line.split(':'))) for line in stripallf(filename)]

### 3 (10 lines, 1 import)
from copy import deepcopy

def passwd_data3(filename):
    dic={}; lst=[]
    FILE = open(filename, "r")
    for line in FILE:
        (dic['username'], dic['password'], dic['uid'], dic['gid'], dic['fullname'], dic['homedir'], dic['shell']) = line.strip().split(':')
        lst.append(deepcopy(dic))
    FILE.close()
    return lst

### 4 (11 lines)
class passwd_line():
    def __init__(self, pwdline):
        (self.username, self.password, self.uid, self.gid, self.fullname, self.homedir, self.shell) = pwdline.strip().split(':')
    def __getitem__(self, key):
        return self.__dict__[key]

def passwd_data4(filename):
    FILE = open(filename, "r")
    passwdfile=[y.strip() for y in FILE.readlines()]
    FILE.close()
    return [passwd_line(line) for line in passwdfile]