python json 파일 읽기

import json
 
CONFIG_FILE="config.json"
CONFIG = {}
 
#
def readConfig(filename):
    with open(filename) as json_config_file:
        js = json.load(json_config_file)
    return js
 
# 
def main():
    global CONFIG_FILE
    global CONFIG
 
    # Read Config.json
    CONFIG = readConfig(CONFIG_FILE)
    print(CONFIG['KEY'])
 
#
if __name__ == "__main__":
    main()