Correct way to use args parser subparser set defaults with imported functions? - python-3.x

Question

I currently have a bunch of stand alone functions that I am trying to implement into a CLI program using argsparse.
The standard way to incorporate functions as command line args seems to be as follows (from the blogs I read):
from consolidate_all_files import consolidate_all_files #my function
import argparse
parser=argparse.ArgumentParser(description="functions for file processing")
subparsers = parser.add_subparsers()
consolidate_parser = subparsers.add_parser("consolidate_files")
consolidate_parser.add_argument('src')
consolidate_parser.add_argument('dest')
consolidate_parser.set_defaults(func=consolidate_all_files)
I don't quite understand how consolidate_all_files will be called with set_defaults.
My consolidate_all_files function looks something like this:
import os
import shutil
def consolidate_all_files(MAIN,DIRS)
for root, subdirs, files in os.walk(DIRS):
'''Basically we move all files from subfolders into one folder '''
print('root', root)
print('subdirs', subdirs)
print('files', files)
for file in files:
path = os.path.join(root, file)
try:
shutil.move(path, MAIN)
except shutil.Error as e:
continue
Most examples I have seen on the web, seem to have their function parameters/arguments revolve around parser args. So would I need to go through each function and change its parameters to something like:
def consolidate_all_files(args)
for root, subdirs, files in os.walk(args.src):
'''Basically we move all files from subfolders into one folder '''
print('root', root)
print('subdirs', subdirs)
print('files', files)
for file in files:
path = os.path.join(root, file)
try:
shutil.move(path, dest)
except shutil.Error as e:
continue
or is there a way to get my original functions to become compatible with subparser's set defaults.
Thank you.