python如何实现像shell中的case功能

import getopt
import sys

arg = getopt.getopt(sys.argv[1:],‘-h‘,[‘help‘])
print(arg)

root@Kali:~/python# python3.5 test.py -h
([(‘-h‘, ‘‘)], [])
root@Kali:~/python# python3.5 test.py --help
([(‘--help‘, ‘‘)], [])

 1 #!/usr/bin/env python3.5
 2 import urllib.request
 3 import getopt
 4 import sys
 5 
 6 opts,args = getopt.getopt(sys.argv[1:],‘-h-f:-v‘,[‘help‘,‘filename=‘,‘version‘])
 7 for opt_name,opt_value in opts:
 8     if opt_name in (‘-h‘,‘--help‘):
 9         print("[*] Help info")
10         exit()
11     if opt_name in (‘-v‘,‘--version‘):
12         print("[*] Version is 0.01 ")
13         exit()
14     if opt_name in (‘-f‘,‘--filename‘):
15         fileName = opt_value
16         print("[*] Filename is ",fileName)
17         # do something
18         exit()

root@Kali:~/python# python3.5 test.py --filename=test
[*] Filename is  test
root@Kali:~/python# python3.5 test.py --filename=
[*] Filename is  
root@Kali:~/python# python3.5 test.py --help
[*] Help info
root@Kali:~/python# python3.5 test.py --version
[*] Version is 0.01 
root@Kali:~/python# python3.5 test.py -v
[*] Version is 0.01 
root@Kali:~/python# python3.5 test.py -f test
[*] Filename is  test
root@Kali:~/python#