针对当前主题构建了自己的CLI答案（完整的源代码位于以下URL）：
http://0netenv.blogspot.com/2016/08/password-generator-with-argparse.html
使用argparse编写了密码生成器。希望这对某人有帮助（构建密码生成器或使用argparse）！
无论哪种方式，构建都很有趣！
$ ./pwgen.py -h
usage: pwgen.py [-h] [-c COUNT] [-a] [-l] [-n] [-s] [-u] [-p]
Create a random password
Special characters, numbers, UPPERCASE -"Oscar",
and lowercase -"lima" to avoid confusion.
Default options (no arguments): -c 16 -a
Enjoy! --0NetEnv@gmail.com
optional arguments:
-h, --help show this help message and exit
-c COUNT, --count COUNT
password length
-a, --all same as -l -n -s -u
-l, --lower include lowercase characters
-n, --number include 0-9
-s, --special include special characters
-u, --upper include uppercase characters
-p, --license print license and exit
这是代码：
license = """
# pwgen -- the pseudo-random password generator
#
# This software is distributed under the MIT license.
#
# The MIT License (MIT)
#
# Copyright (c) 2016 0NetEnv 0netenv@gmail.com
# Permission is hereby granted, free of charge, to any
# person obtaining a copy of this software and associated
# documentation files (the "Software"), to deal in the
# Software without restriction, including without
# limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies
# of the Software, and to permit persons to whom the
# Software is furnished to do so, subject to the following
# conditions:
#
# The above copyright notice and this permission notice
# shall be included in all copies or substantial portions
# of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF
# ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED
# TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
# PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT
# SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
# CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
# OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR
# IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
#
# NOTE:
# This software was tested on Slackware 14.2, Raspbian, &
# Mac OS X 10.11
#
"""
import string
import random
import sys
import argparse
from argparse import RawTextHelpFormatter
typo = ''
c = 16
counter = 0
line = '-' * 40
def pwgen(z, t):
charsset = ''
U = 'ABCDEFGHIJKLMNPQRSTUVWXYZ'
L = 'abcdefghijkmnopqrstuvwxyz'
N = '0123456789'
S = '!@#$%^&*?<>'
z = int(z)
for type in t:
if 'u' in t:
charsset = charsset + U
if 'l' in t:
charsset = charsset + L
if 'n' in t:
charsset = charsset + N
if 's' in t:
charsset = charsset + S
if 'a' == t:
charsset = charsset + U + L + N + S
return ''.join(random.choice(charsset) for _ in range(0, int(z)))
parser = argparse.ArgumentParser(description='\n Create a random password\n\
Special characters, numbers, UPPERCASE -"Oscar",\n\
and lowercase -"lima" to avoid confusion.\n\
Default options (no arguments): -c 16 -a\n\
\t\tEnjoy! --0NetEnv@gmail.com', formatter_class=argparse.RawTextHelpFormatter)
parser.add_argument("-c", "--count", dest="count", action="store", help="password length")
parser.add_argument("-a", "--all", help="same as -l -n -s -u", action="store_true")
parser.add_argument("-l", "--lower", help="include lowercase characters", action="store_true")
parser.add_argument("-n", "--number", help="include 0-9", action="store_true")
parser.add_argument("-s", "--special", help="include special characters", action="store_true")
parser.add_argument("-u", "--upper", help="include uppercase characters", action="store_true")
parser.add_argument("-p", "--license", help="print license and exit", action="store_true")
results = args = parser.parse_args()
if args.count == '0':
print ("Input error:\nCannot create a zero length password.\nExiting")
exit (0)
if args.lower:
typo = typo + 'l'
counter = counter + 1
if args.number:
typo = typo + 'n'
counter = counter + 1
if args.special:
typo = typo + 's'
counter = counter + 1
if args.upper:
typo = typo + 'u'
counter = counter + 1
if args.all:
typo = 'a'
counter = counter + 1
if args.license:
print (license)
exit (1)
if args.count:
if counter == 0:
typo = 'a'
print ("defaulting to '--all'")
print (line)
print (pwgen(results.count,typo))
else:
if counter == 0:
typo = 'a'
print ("defaulting to '--count 16 --all'")
print (line)
print (pwgen(c,typo))
print (line)
