What is > operator doing in the shell (argpare python module)?

Asked Feb 27 '20 at 22:54

Active Feb 28 '20 at 10:22

Viewed 46 times

This is what I execute in the terminal: python test.py display -n 10 -f output.out --start_date 2020-01-01 --end_date 2020-01-10 --filter distance:>=:5

While executing the code, until using --filter distance:=>:5 the program parse arguments correctly when it reaches distance:>=:5 filter equals to "distance:" and it prints everything in the file named "=:5".

test.py (removed help and others for readablity):

import argparse
parser = argparse.ArgumentParser()

parser.add_argument("action",
                    choices=["display", "csvfil"])
parser.add_argument("-n", "--number", type=int, required=True)
parser.add_argument("-f", "--file")
parser.add_argument("-s", "--start_date")
parser.add_argument("-e", "--end_date")
parser.add_argument("-filt", "--filter")
a = parser.parse_args()
print(a)

The file called =:5

Namespace(action='display', end_date='2020-01-10', file='output.out', filter='distance:', number=10, start_date='2020-01-01')

edited Feb 28 '20 at 10:18

asked Feb 27 '20 at 22:54

SKREFI

1

The shell is interpreting the '>' as `stdout` redirection. It does not get passed to `sys.argv` (you can check that) or to the `parser`. – hpaulj Feb 27 '20 at 22:59
Is there any other way of doing this, except using quotes? – SKREFI Feb 28 '20 at 10:17
Does there need to be another way? – deceze Feb 28 '20 at 10:23
Not really, just curious if I can "bypass" the redirection. – SKREFI Feb 28 '20 at 11:44
1

You can use a backslash (`\`) to escape a single character, if you dislike quotes. – user1934428 Feb 28 '20 at 13:26

What is > operator doing in the shell (argpare python module)?

0 Answers0