logParse.py

#!/bin/python3
import json
import sys
import traceback

# termcolor available via pypi
try:
    from termcolor import colored
except Exception as e:
    print(e, file=sys.stderr)

sevColor = {
    'info': 'cyan',
    'INFO': 'cyan',
    'DEBUG': 'blue',
    'WARN': 'yellow',
    'ERROR': 'red',
}

def main():
    while True:
        try:
            line = input()
        except EOFError:
            return

        try:
            data = json.loads(line)
        except ValueError as e:
            print(line)
        except:
            traceback.print_exc()
        else:
            sev = data.get('severity')

            text = '{:>5s}: {}'.format(
                sev,
                data.get('message', data.get('msg', line)),
            )

            try:
                color = sevColor.get(sev, 'white')
                print(colored(text, color))
            except (KeyError, NameError):
                print(text)

if __name__ == '__main__':
    main()