How to read/process command line arguments?

0 votes
I am originally a C programmer. I have seen numerous tricks and "hacks" to read many different arguments.

What are some of the ways Python programmers can do this?
Jun 4, 2018 in Python by charlie_brown
• 7,720 points
32 views

1 answer to this question.

0 votes

The canonical solution in the standard library is argparse (docs):

Here is an example:

from argparse import ArgumentParser

parser = ArgumentParser()
parser.add_argument("-f", "--file", dest="filename",
                    help="write report to FILE", metavar="FILE")
parser.add_argument("-q", "--quiet",
                    action="store_false", dest="verbose", default=True,
                    help="don't print status messages to stdout")

args = parser.parse_args()

argparse supports (among other things):

  • Multiple options in any order.
  • Short and long options.
  • Default values.
  • Generation of a usage help message
answered Jun 4, 2018 by ariaholic
• 7,340 points

Related Questions In Python

0 votes
1 answer

How to read/process command line arguments?

The canonical solution in the standard library ...READ MORE

answered Aug 8, 2018 in Python by bug_seeker
• 15,350 points
24 views
0 votes
1 answer

How to input optional arguments in python command line?

Please use this code. if len(sys.argv) == 2: first_log ...READ MORE

answered Jul 11 in Python by Suri
15 views
0 votes
1 answer

How to read a large file, line by line, in Python?

The correct, fully Pythonic way to read ...READ MORE

answered Jul 1 in Python by SDeb
• 13,160 points
24 views
+3 votes
5 answers

How to read multiple data files in python

Firstly we will import pandas to read ...READ MORE

answered Apr 6, 2018 in Python by DeepCoder786
• 1,700 points
1,691 views
0 votes
1 answer

How to add a new line in Python?

You can use '\n' for a next ...READ MORE

answered May 2, 2018 in Python by aayushi
• 750 points
88 views
0 votes
1 answer

In Python, how do I read a file line-by-line into a list?

with open(fname) as f:     content = f.readlines() # you ...READ MORE

answered Oct 9, 2018 in Python by SDeb
• 13,160 points
113 views
0 votes
1 answer

How can I use python to execute a curl command?

For sake of simplicity, maybe you should ...READ MORE

answered Oct 11, 2018 in Python by charlie_brown
• 7,720 points
14,145 views
0 votes
1 answer

How to read Excel File in Python

With pandas it is possible to get ...READ MORE

answered Oct 22, 2018 in Python by Priyaj
• 56,520 points
138 views
0 votes
1 answer

How to get the size of a string in Python?

If you are talking about the length ...READ MORE

answered Jun 4, 2018 in Python by ariaholic
• 7,340 points
87 views
0 votes
1 answer

How to sort a list of strings?

Basic answer: mylist = ["b", "C", "A"] mylist.sort() This modifies ...READ MORE

answered Jun 4, 2018 in Python by ariaholic
• 7,340 points
38 views