如何将记录器输出重定向到 PyQt 文本小部件 [英] How to Redirect Logger Output into PyQt Text Widget
问题描述
发布在 并将其添加到您的 logger
:
导入日志logger = logging.getLogger(__name__)类 QtHandler(logging.Handler):def __init__(self):logging.Handler.__init__(self)def 发射(自我,记录):记录 = self.format(记录)XStream.stdout().write("{}\n".format(record))处理程序 = QtHandler()handler.setFormatter(logging.Formatter("%(levelname)s: %(message)s"))logger.addHandler(处理程序)logger.setLevel(logging.DEBUG)
然后删除 if __name__ == "__main__":
块中的 logging.basisConfig(level=logging.DEBUG)
行.您只会在对话框中看到您的日志消息.
A code posted on Redirecting Output in PyQt does two good things at once: it takes advantage of logging
module to nicely format messages and it redirects standard stdout
and stderr
in to QT QTextBrowser
widget.
But I would like QTextBrowser
to receive all the print output coming out of running code. Particularly I want to redirect the nicely formatted messages that come from logger.
An ideal solution would re-direct every logger. output in to QTextBrowser
(and not just stdout
and stderr
). As a matter of fact I would rather redirect logger's messages instead of stdout
and stderr
ones if I would have to make a choice between the twos....
So here are the commands used to printout formatted messages:
logger.debug('debug message')
logger.info('info message')
logger.warning('warning message')
logger.error('error message')
And here is the code:
========
import sys
from PyQt4 import QtCore, QtGui
import logging
logger = logging.getLogger(__name__)
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))
@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 MyDialog(QtGui.QDialog):
def __init__( self, parent = None ):
super(MyDialog, self).__init__(parent)
self._console = QtGui.QTextBrowser(self)
self._button = QtGui.QPushButton(self)
self._button.setText('Test Me')
layout = QtGui.QVBoxLayout()
layout.addWidget(self._console)
layout.addWidget(self._button)
self.setLayout(layout)
XStream.stdout().messageWritten.connect( self._console.insertPlainText )
XStream.stderr().messageWritten.connect( self._console.insertPlainText )
self._button.clicked.connect(self.test)
def test( self ):
print 'printing LINE 1'
print 'printing LINE 2'
logger.debug('debug message')
logger.info('info message')
logger.warning('warning message')
logger.error('error message')
# error out something
print blah
if ( __name__ == '__main__' ):
# logging.basicConfig()
# logging.basicConfig(filename='example.log',level=logging.DEBUG)
logging.basicConfig(level=logging.DEBUG)
app = None
if ( not QtGui.QApplication.instance() ):
app = QtGui.QApplication([])
dlg = MyDialog()
dlg.show()
if ( app ):
app.exec_()
POSTED LATER::FULLY WORKING EXAMPLE::SOLVED BY Mr.Dano
import sys
from PyQt4 import QtCore, QtGui
import logging
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)
# originally: XStream.stdout().write("{}\n".format(record))
logger = logging.getLogger(__name__)
handler = QtHandler()
handler.setFormatter(logging.Formatter("%(levelname)s: %(message)s"))
logger.addHandler(handler)
logger.setLevel(logging.DEBUG)
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))
@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 MyDialog(QtGui.QDialog):
def __init__( self, parent = None ):
super(MyDialog, self).__init__(parent)
self._console = QtGui.QTextBrowser(self)
self._button = QtGui.QPushButton(self)
self._button.setText('Test Me')
layout = QtGui.QVBoxLayout()
layout.addWidget(self._console)
layout.addWidget(self._button)
self.setLayout(layout)
XStream.stdout().messageWritten.connect( self._console.insertPlainText )
XStream.stderr().messageWritten.connect( self._console.insertPlainText )
self._button.clicked.connect(self.test)
def test( self ):
logger.debug('debug message')
logger.info('info message')
logger.warning('warning message')
logger.error('error message')
print 'Old school hand made print message'
if ( __name__ == '__main__' ):
app = None
if ( not QtGui.QApplication.instance() ):
app = QtGui.QApplication([])
dlg = MyDialog()
dlg.show()
if ( app ):
app.exec_()
You can create a custom logging.Handler
and add it to your logger
:
import logging
logger = logging.getLogger(__name__)
class QtHandler(logging.Handler):
def __init__(self):
logging.Handler.__init__(self)
def emit(self, record):
record = self.format(record)
XStream.stdout().write("{}\n".format(record))
handler = QtHandler()
handler.setFormatter(logging.Formatter("%(levelname)s: %(message)s"))
logger.addHandler(handler)
logger.setLevel(logging.DEBUG)
Then remove the logging.basisConfig(level=logging.DEBUG)
line in the if __name__ == "__main__":
block. You'll see your log messages only appear in your dialog box.
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