Python script that copies new key-value pairs from sample_config.json to config.json

copy_config.py

'''
Python script that copies new key-value pairs from sample_config.json to config.json
'''

import json

sample_file = open('sample_config.json', 'r')
sample_contents = json.loads(sample_file.read())
sample_file.close()

try:
    config_file = open('config.json', 'r')
    config_contents = json.loads(config_file.read())
    config_file.close()
except: # file doesn't exist or is empty
    config_contents = {}

for key, val in sample_contents.items():
    if key not in config_contents:
        config_contents[key] = val

with open('config.json', 'w') as config_file:
    json.dump(config_contents, config_file, indent=4)