Json Flattening Python Code - My First Useful Solution in python

octovariables.py

#! python
import shutil
import sys
import json
from flatten_json import flatten

# Author: Lalit kale
# Tested with python version 3.6.6
# This is the program through which build engineers can transform appsettings.json file 
# into Octopus Deploy tool's variables in the format required by my employer.
# How to Run the Program
# 1. Install Python 
# 2. On Command Line execute following command without ''
# 3. 'pip install flatten_json'
# 4. On Command line execute 'py .\octovariables.py' 
# from the same directory as that of python script and appsettings.json

input_file = 'appsettings.json'
output_file = 'ocotpus_variables.json'
seperator_char = '__'

with open(input_file) as json_file:
    dataDict = json.load(json_file)

result = flatten(dataDict,seperator_char)

with open(output_file, 'w') as outfile:  
    json.dump(result, outfile)
    outfile.close()

print("Octopus variables file generated successfully!")