warning_counter.py

import logging

class MsgCounterHandler(logging.Handler):
    level2count = None

    def __init__(self, *args, **kwargs):
        super(MsgCounterHandler, self).__init__(*args, **kwargs)
        self.level2count = {}

    def emit(self, record):
        l = record.levelname
        if l not in self.level2count:
            self.level2count[l] = 0
        print(l)
        self.level2count[l] += 1