首页 > itarticle > python read parameters from commandline – 子平

python read parameters from commandline – 子平

admin 11月 12, 2020 0

The simplest way to do this is to use sys module.

python test.py hello world

import sys
print "File name：", sys.argv[0]
for i in range(1, len(sys.argv)):
    print "Para", i, sys.argv[i]

# File name：test.py Para 1 hello Para 2 world

If we want to pass parameter in a standard way, we use getopt

import sys, getopt
opts, args = getopt.getopt(sys.argv[1:], "hi:o:")
input_file=""
output_file=""
for op, value in opts:
    if op == "-i":
        input_file = value
    elif op == "-o":
        output_file = value
    elif op == "-h":
        usage()
        sys.exit

Explaination:

sys.argv[1:]: the list for the parameters we have to handle.
“hi: o:”: represent the options. If a “:” follows, there have to be a parameters.