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LogUtils.py
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LogUtils.py
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#!/usr/bin/env python
# coding:utf-8
"""
:Author: Sonia Karkar -- karkar@in2p3.fr
:What: Tools for logging from various methods or modules
and to various destinations (console, files, qt window...)
"""
# from __future__ import unicode_literals
import logging
from logging import handlers
import sys
import os
from PyQt4 import QtCore, QtGui
if __name__ == "__main__":
logname = os.path.basename(__file__)[:-3]
else:
logname = __name__
if len(logname) > 20:
logname = logname[:9] + "--" + logname[-9:]
orange = QtGui.QColor(255, 140, 0)
class QtHandler(logging.Handler):
def __init__(self):
logging.Handler.__init__(self)
def emit(self, record):
record = self.format(record)
if record:
XStream.stdout().write('%s\n' % record)
def addQtHandler(logger):
# Make the logger also print in the qt window
qthandler = QtHandler()
logformat = logging.Formatter("%(asctime)s - %(name)-20s -"
+ "%(levelname)-5s - %(message)s")
qthandler.setFormatter(logformat)
logger.addHandler(qthandler)
def configure_my_logger(logger, filename, qt=False):
logger.setLevel(logging.INFO)
# define format
logformat = logging.Formatter("%(asctime)s - %(name)-20s -"
+ "%(levelname)-5s - %(message)s")
# print messages to terminal
ch = logging.StreamHandler(sys.stdout)
ch.setFormatter(logformat)
logger.addHandler(ch)
# also print messages to file
fh = handlers.RotatingFileHandler(
filename, maxBytes=(1048576 * 5), backupCount=7)
fh.setFormatter(logformat)
logger.addHandler(fh)
if qt:
addQtHandler(logger)
def MyLog(logname, qt=False, logdir=""):
if len(logdir) > 0:
LOGFILE = logdir + logname + ".log"
else:
LOGFILE = logname + ".log"
log = logging.getLogger(logname)
configure_my_logger(log, LOGFILE, qt)
return log
def CloseAll(log):
for hdlr in list(log.handlers):
log.removeHandler(hdlr)
hdlr.close()
class XStream(QtCore.QObject):
_stdout = None
_stderr = None
messageWritten = QtCore.pyqtSignal(str)
def flush(self):
pass
def fileno(self):
return -1
def write(self, msg):
if (not self.signalsBlocked()):
# self.messageWritten.emit(unicode(msg))
self.messageWritten.emit(msg)
@staticmethod
def stdout():
if (not XStream._stdout):
XStream._stdout = XStream()
sys.stdout = XStream._stdout
return XStream._stdout
@staticmethod
def stderr():
if (not XStream._stderr):
XStream._stderr = XStream()
sys.stderr = XStream._stderr
return XStream._stderr
class LogWin(QtGui.QTextEdit):
def __init__(self, myqtapp):
super(LogWin, self).__init__()
self.myqtapp = myqtapp
self._console = QtGui.QTextBrowser(self)
self.move(self.myqtapp.desktop().availableGeometry(1).topLeft())
self.resize(700, 500)
self.setWindowTitle("Info")
self._console.resize(700, 500)
layout = QtGui.QVBoxLayout()
layout.addWidget(self._console)
XStream.stdout().messageWritten.connect(self._console.insertPlainText)
XStream.stderr().messageWritten.connect(self._console.insertPlainText)
self.show()
if __name__ == '__main__':
log = MyLog(logname, qt=True, logdir=os.getenv("HOME") + "/log/")
log.info("log created")
app = QtGui.QApplication(sys.argv)
logwin = LogWin(app)
log.debug('debug message')
log.info('info message')
log.warning('warning message')
log.error('error message')
print 'Old school hand made print message'
sys.exit(app.exec_())