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+--- Thread: How to launch a program through python script - Mac OS Mojave (/thread-18120.html)
How to launch a program through python script - Mac OS Mojave - Aurimas - May-06-2019
Dear Python forum members,
I am trying to write and launch a python script through terminal at Mac OS Mojave, however I am getting this error:
Error:$ python bandom_voronota_paleisti.py
> 3dvo.pdb1
sh: input_file: No such file or directoryThe code I have is this:
import sys, os
input_file_v2 = raw_input('> ')
input_file_v1 = open(input_file_v2, 'r+')
input_file = input_file_v1.read()
os.system("voronota get-balls-from-atoms-file --annotated < input_file") # doesn't work with input_fileShouldn't it be possible to run my external program (voronota) that is run through terminal simply with raw_input? I have tried it but received the same error when not setting the input file to be readable. However, after setting it I still get this error. What could be the problem?Thank you very much fo your assistance.
Sincerely,
Aurimas
RE: How to launch a program through python script - Mac OS Mojave - micseydel - May-07-2019
"input_file" is embedded as a string, it's not used as a variable. You need to do string formatting like so:
"voronota get-balls-from-atoms-file --annotated < {}".format(input_file)Note that code like this is subject to security issues if anyone can specify the filename. Not likely an issue but hard to not at least bring up here.
RE: How to launch a program through python script - Mac OS Mojave - kritesh - May-11-2019
If you’re not familiar with the language, you can recognize scripts written in Python by their distinctive “.py” file extension. Python scripts can be executed in a couple different ways, depending on what tools you have at your disposal. Hope above information will help you.