fifolog.py

#
# FIFO memory logger
#

from logging.handlers import BufferingHandler

class FIFOHandler(BufferingHandler):
    def shouldFlush(self, record):
        return False

    def emit(self, record):
        self.buffer.append(record)
        l=len(self.buffer)
        if l>self.capacity:
            self.buffer=self.buffer[(l-self.capacity):(l-1)]

    def formatAll(self):
        return [self.format(record) for record in self.buffer]