我是 PyQt 和一般處理程式的新手，我試圖從我找到的每個 repo 中讀取，但我不知道如何解決我的問題，正如你在我的代碼中看到的那樣，我正在后臺執行日志記錄執行緒我正在嘗試在我的 QPlainTextEdit 控制臺中顯示日志-出于某種原因，我可以在終端中看到日志，而 text_box 根本沒有得到日志，我將非常感謝您的聰明幫助。
import pandas as pd
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
import time
import os
import threading
import json
class ConsolePanelHandler(logging.Handler):
def __init__(self, stream):
# super().__init__()
logging.Handler.__init__(self)
# logging.StreamHandler.__init__(self, stream)
self.stream = stream
def handle(self, record):
rv = self.filter(record)
if rv:
self.acquire()
try:
self.emit(record)
finally:
self.release()
return rv
def emit(self, record):
try:
stream = self.stream
stream(self.format(record))
except RecursionError:
raise
except Exception:
self.handleError(self.format(record))
def thread():
for index in range(20):
logging.warning('scheiBe ' str(index))
time.sleep(1)
class MainWindow(QMainWindow):
def __init__(self):
super().__init__()
layout = QVBoxLayout()
self.continue_ = QPushButton("Continue")
self.continue_.setStyleSheet("background-color: green")
self.continue_.setFont(QFont('SansSerif', 10))
self.continue_.setFixedSize(QSize(300, 22))
self.pause = QPushButton("Pause")
self.pause.setStyleSheet("background-color: orange")
self.pause.setFont(QFont('SansSerif', 10))
self.pause.setFixedSize(QSize(300, 22))
self.stop = QPushButton("Stop")
self.stop.setStyleSheet("background-color: #FD4B4B")
self.stop.setFont(QFont('SansSerif', 10))
self.stop.setFixedSize(QSize(300, 22))
self.text_box = QPlainTextEdit()
self.text_box.setPlaceholderText("Bugs will be printed here")
self.text_box.setReadOnly(True)
logging.getLogger().addHandler(self.text_box)
logging.getLogger().setLevel(logging.DEBUG)
ConsolePanelHandler(self.appendDebug , logging.DEBUG)
self.text_box.moveCursor(QTextCursor.End)
layout.addWidget(self.continue_)
layout.addWidget(self.pause)
layout.addWidget(self.stop)
layout.addWidget(self.text_box)
self.w = QWidget()
self.w.setLayout(layout)
self.setCentralWidget(self.w)
thread1 = threading.Thread(target=thread, args=(), daemon=True)
thread1.start()
self.show()
def closeEvent(self, event):
close = QMessageBox()
close.setText("Are you sure want to stop and exit?")
close.setStandardButtons(QMessageBox.Yes | QMessageBox.Cancel)
close = close.exec()
if close == QMessageBox.Yes:
sys.exit()
else:
event.ignore()
def appendDebug(self, string):
self.text_box.appendPlainText(string '\n')
if __name__ == "__main__":
app = QApplication([])
window = MainWindow()
sys.exit(app.exec())
uj5u.com熱心網友回復：
首先，您不應該傳遞更新的函式，text_area而是應該創建一個pyqtSignal更新的函式text_area并將其傳遞給ConsolePanelHandler.
添加ConsolePanelHandler為處理程式text_area不logging.getLogger().addHandler()
并且建議使用QThread而不是threading.Thread
這是完整的更新代碼。
# import pandas as pd
from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
import time
import os
import sys
import threading
import json
import logging
class ConsolePanelHandler(logging.Handler):
def __init__(self, sig):
# super().__init__()
logging.Handler.__init__(self)
# logging.StreamHandler.__init__(self, stream)
self.stream = sig
def handle(self, record):
rv = self.filter(record)
if rv:
self.acquire()
try:
self.emit(record)
finally:
self.release()
return rv
def emit(self, record):
try:
self.stream.emit(self.format(record))
except RecursionError:
raise
except Exception:
self.handleError(record)
class thread(QThread):
def run(self) -> None:
for index in range(20):
logging.warning('scheiBe ' str(index))
self.sleep(1)
class MainWindow(QMainWindow):
sig = pyqtSignal(str)
def __init__(self):
super().__init__()
self.layout = QVBoxLayout()
self.continue_ = QPushButton("Continue")
self.continue_.setStyleSheet("background-color: green")
self.continue_.setFont(QFont('SansSerif', 10))
self.continue_.setFixedSize(QSize(300, 22))
self.pause = QPushButton("Pause")
self.pause.setStyleSheet("background-color: orange")
self.pause.setFont(QFont('SansSerif', 10))
self.pause.setFixedSize(QSize(300, 22))
self.stop = QPushButton("Stop")
self.stop.setStyleSheet("background-color: #FD4B4B")
self.stop.setFont(QFont('SansSerif', 10))
self.stop.setFixedSize(QSize(300, 22))
self.c = ConsolePanelHandler(self.sig)
self.text_box = QPlainTextEdit()
self.text_box.setPlaceholderText("Bugs will be printed here")
self.text_box.setReadOnly(True)
logging.getLogger().addHandler(self.c)
logging.getLogger().setLevel(logging.DEBUG)
self.sig.connect(self.appendDebug)
self.text_box.moveCursor(QTextCursor.End)
self.layout.addWidget(self.continue_)
self.layout.addWidget(self.pause)
self.layout.addWidget(self.stop)
self.layout.addWidget(self.text_box)
self.w = QWidget()
self.w.setLayout(self.layout)
self.setCentralWidget(self.w)
self.thread1 = thread(self) # self is parent for Qthread so Qthread will be destroyed when it's parent no longer exist
self.thread1.start()
self.show()
def closeEvent(self, event):
close = QMessageBox()
close.setText("Are you sure want to stop and exit?")
close.setStandardButtons(QMessageBox.Yes | QMessageBox.Cancel)
close = close.exec()
if close == QMessageBox.Yes:
self.thread1.terminate()
sys.exit()
else:
event.ignore()
@pyqtSlot(str)
def appendDebug(self, string):
self.text_box.appendPlainText(string '\n')
if __name__ == "__main__":
app = QApplication([])
window = MainWindow()
sys.exit(app.exec())
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標籤：python-3.x 多线程 日志记录 pyqt pyqt5