How to load module into python with argv

Question

I want to load oneRunParams.py into my current program but won't know where it is till I run it. I want to have it as an input argument, accessed through argv. I was using:

from oneRunParams import *

I now want to replace this with something that will do the same only with the path to oneRunParams specified.

Answer 1

You can use __import__:

Here is test.py:

# test.py
import sys

filename = sys.argv[1]
f = __import__(filename[:-3]) # This removes the `.py` extension
f.test()

Here is test2.py:

# test2.py
def test():
    print('hello world')

Running the following the command line:

python test.py test2.py

Gives the following output:

hello world

If you really want to load everything in local scope, you have to do the following:

filename = sys.argv[1]
f = __import__(filename[:-3], globals(), locals(), ['*'])
for k in dir(f):
    locals()[k] = getattr(f, k)

test()

Answer 2

from sys import argv

Use above statement.

fileName=argv[0]