logger.py

# Copyright (c) 2021 MIT
# 
# Permission to use, copy, modify, and distribute this software for any
# purpose with or without fee is hereby granted, provided that the above
# copyright notice and this permission notice appear in all copies.
#
# THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR(S) DISCLAIM ALL WARRANTIES
# WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
# MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL AUTHORS BE LIABLE FOR
# ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
# WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
# ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
# OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

import time
import sys

class Logger:
    logLevel = 0 # 0: verbose, 1: info, 2: error
    outputFp = sys.stdout

    @classmethod
    def setLevel(cls, newLogLevel):
        cls.logLevel = newLogLevel

    @classmethod
    def setLogTarget(cls, newTargetFp):
        cls.outputFp = newTargetFp
    
    @classmethod
    def log(cls, statement, level = 1, takeTimestamp = True, flush = False):
        if level >= cls.logLevel:
            ts = time.time()
            cls.outputFp.write("%12.6f  %s\n" % (ts, statement))
            if flush:
                cls.outputFp.flush()