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Execution error when Passing arguments to a python script using os.system. The script takes sys.argv arguments


Execution error when Passing arguments to a python script using os.system. The script takes sys.argv arguments

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Execution error when Passing arguments to a python script using os.system. The script takes sys.argv arguments
Tag : python , By : uxn
Date : January 11 2021, 03:34 PM

this will help Inside a normal string, no variable interpretation is applied. So you literally asked to read from a file named sys.argv[1] (possibly sys.argv1 if the file exists, thanks to shell globbing), and write to a file named sys.argv[2].
If you want to use the values sys.argv in your script, you need to format them into the string, e.g. with f-strings (modern Python 3.6 or so only):
os.system(f'stat.py < {sys.argv[1]} > {sys.argv[2]}')  # Note f at beginning of literal
os.system('stat.py < {} > {}'.format(sys.argv[1], sys.argv[2]))
with open(sys.argv[1], 'rb') as infile, open(sys.argv[2], 'wb') as outfile:
    subprocess.run(['stat.py'], stdin=infile, stdout=outfile)

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Passing arguments containing white space through a wrapper shell script to python script


Tag : python , By : foxthrot
Date : March 29 2020, 07:55 AM
With these it helps I have a wrapper script command.sh as main launch script for my python application, primarily to set some environment variables like PYTHONPATH: , Use $@ instead of $*, and quote it with ":
#!/bin/bash

export PYTHONPATH=lib64/python/side-packages
./command.py "$@"

How to use sys.argv in python to check length of arguments so it can run as script?


Tag : python , By : Mark W
Date : March 29 2020, 07:55 AM
hop of those help? What is sys.arvg:
The list of command line arguments passed to a Python script. argv[0] is the script name.
import sys

if __name__=="__main__":
    print "command arguments:", sys.argv 
$ python 1.py arg1 arg2 
command arguments: ['1.py', 'arg1', 'arg2']
$ python 1.py
command arguments: ['1.py']
import sys

if __name__ == '__main__':
    try:
        arg_command = sys.argv[1]
    except IndexError:
        arg_command = ""

    Done = False
    while not Done:
        if arg_command=="":
            print('\nMenu')
            print('C Clear All')
            print('L Load Encrypted File')
            print('Q Quit')
            print('----------------')
            print('Enter Choice>')
            command = raw_input('Enter Selection> ').strip()[0].upper()
        else:
            command = arg_command
            #- set arg value to empty to run Menu option again.
            arg_command = ""

        if command == 'C':
            print "In Clear All event."
        elif command == 'L':
            print "In Clear All event."
        elif command == "Q":
            break
        else:
            print "Wrong Selection."
$ python 1.py C
In Clear All event.

Menu
C Clear All
L Load Encrypted File
Q Quit
----------------
Enter Choice>
Enter Selection> q
$ 
$ python 1.py

Menu
C Clear All
L Load Encrypted File
Q Quit
----------------
Enter Choice>
Enter Selection> l
In Clear All event.

Menu
C Clear All
L Load Encrypted File
Q Quit
----------------
Enter Choice>
Enter Selection> q
$ 

Passing arguments to a python blender script, through the brenda-web interface, how do I parse the arguments?


Tag : python , By : mckasty
Date : March 29 2020, 07:55 AM
around this issue You can make your own parser, by using iterators. This code will seperate your arguments into two dicts (before and after the --):
args = '-b testscene.blend --python localrender.py -- -start 1 -type diffuse -samples 100'
iter = (i for i in args.split(' '))

args_dict = {'part1': {}, 'part2': {}}
current_part = 'part1'
for chunk in iter:
    if chunk == '--':
        current_part = 'part2'
        continue
    if chunk.startswith('-'):
        args_dict[current_part][chunk.lstrip('-')] = next(iter)

print(args_dict)
{'part1': {'b': 'testscene.blend', 'python': 'localrender.py'},
 'part2': {'samples': '100', 'start': '1', 'type': 'diffuse'}}

python script that takes command line arguments needs to be called from another python script


Tag : python , By : LUK
Date : March 29 2020, 07:55 AM
will be helpful for those in need I completely understand that I should have written the script right the first time, but the fact is I have a script that generates a data file based upon two values passed to it from the command line- like this: , Let's break this down into pieces:
exec(open("./sim_gen.py 100 .3").read())
f = open("./sim_gen.py 100 .3")
contents = f.read()
exec(contents)
import subprocess
import sys
subprocess.run([sys.executable, "./sim_gen.py", "100", ".3"])
import sys
_argv = sys.argv
try:
    sys.argv = ["./sim_gen.py", "100", ".3"]
    with open("./sim_gen.py 100 .3"):
        exec(f.read())
finally:
    sys.argv = _argv

No arguments in sys.argv when calling Python Script directly on Windows


Tag : python , By : Timbo
Date : March 29 2020, 07:55 AM
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