How to import input variable from another file without repeated running this input function?

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My master.py asks for participant name and then run other .py files that use this name:

master.py:

participant = str(input("Participant's name: "))

if __name__ == "__main__":
    import os, subprocess
    cDir = os.path.dirname(os.path.realpath(__file__))
    files = ['antisaccade','change_detection','digit_span']
    for f in files:
        wDir = cDir+ '/' + f
        subprocess.run(["python", f+'.py'], cwd=wDir)

For example, digit_span.py:

sys.path.append(os.path.abspath('../'))
from master import participant
filename = u'data/%s_%s_%s' % participant

So each time files are run, they cyclically call line with input:

participant = str(input("Participant's name: "))

But I need to ask for participant's name only once and then send it to other files.

If I put input() inside if, I get the

ImportError: cannot import name 'participant'

Could someone explain how to solve this, please?

import python-3.x input python
1 Answers

If master.py ask for name and run scripts .py which are in the list, what you can do is to pass the name as arguement.

Just like this:

master.py

participant = list([str(input("Participant's name: "))])
if __name__ == "__main__":
    import os, subprocess
    cDir = os.path.dirname(os.path.realpath(__file__))
    files = ['slave']
    for f in files:
        wDir = cDir+ '/' + f
        subprocess.Popen(["python", "{0}.py".format(wDir)]+participant)

slave.py

import sys

with open("check.txt".format(sys.argv[1]),'w') as f:
    f.write("{0} participant".format(sys.argv[1]))

master.py will run slave.py along with the arguments.

To test the result, it will generate a file check.txt with participant's name in it which means that master.py is passing the name to the (slave.py)script.

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