将 Python 控制台输出打印到 Qtextedit答案

【问题标题】：Print out Python console output to Qtextedit将 Python 控制台输出打印到 Qtextedit
【发布时间】：2021-12-13 10:25:57
【问题描述】：

当我按下按钮时，我有这样的输出：

['VERSION', 'ROMMON', 'HOSTNAME', 'UPTIME', 'RUNNING_IMAGE', “硬件”、“串行”、“配置寄存器”]

['12.2(55)SE7', 'Bootstrap', 'Revo-Solusindo-01', '1 小时, 27 分钟', 'c2960s-universalk9-mz.122-55.SE7.bin', ['WS-C2960S-24PD-L'], ['FOC1644Z129'], '0xF'] 写入1条记录

[“风扇”、“温度”、“温度值”、“温度状态”、 'YELLOW_THRESHOLD'、'RED_THRESHOLD'、'POWER'、'RPS']

['OK', 'OK', '33', 'GREEN', '54', '64', '', ''] 写1条记录

['总计'，'免费']

['57931776', '29178368']

['524288', '523212'] 写入2条记录

['MEMTYPE', 'HEAD', 'TOTAL', 'USED', 'FREE', 'LOW', 'LARGE']

['处理器', '2BA9598', '73910760', '26908308', '47002452', '45367928', '30211716']

['I/O', '6200000', '14680064', '12406764', '2273300', '2273300', '2273024']

['驱动程序', '1A00000', '1048576', '44', '1048532', '1048532', '1048532'] 写入 3 条记录

['CPU_5_SEC', 'CPU_1_MIN', 'CPU_5_MIN']

['10', '10', '9'] 写入1条记录

如何将后台进程的输出打印到Qtextedit？

我的代码：

import sys
from PyQt4 import QtGui, QtCore
import jtextfsm as textfsm

class Window(QtGui.QMainWindow):
    def __init__(self):
        super(Window, self).__init__()
        self.setGeometry(50, 50, 500, 300)
        self.setWindowTitle("PyQT tuts!")
        self.setWindowIcon(QtGui.QIcon('pythonlogo.png'))
        self.home()

    def home(self):
        btn = QtGui.QPushButton("Generate", self)
        btn.clicked.connect(self.TextFSM)
        btn.resize(100, 50)
        btn.move(50, 50)

        process  = QtGui.QTextEdit(self)
        process.moveCursor(QtGui.QTextCursor.Start)
        process.ensureCursorVisible()
        process.setLineWrapColumnOrWidth(500)
        process.setLineWrapMode(QtGui.QTextEdit.FixedPixelWidth)
        process.setFixedWidth(400)
        process.setFixedHeight(150)
        process.move(50,100)

        self.show()

    def TextFSM(self):

        nameFile = 'Switch'

        try:
            input_file = open(nameFile + '.txt', encoding='utf-8')  # show version
            raw_text_data = input_file.read()
            input_file.close()

            input_file2 = open(nameFile + '.txt', encoding='utf-8')  # show env
            raw_text_data2 = input_file2.read()
            input_file2.close()

            input_file3 = open(nameFile + '.txt', encoding='utf-8')  # show flash
            raw_text_data3 = input_file3.read()
            input_file3.close()

            input_file4 = open(nameFile + '.txt', encoding='utf-8')  # show memory statistic
            raw_text_data4 = input_file4.read()
            input_file4.close()

            input_file5 = open(nameFile + '.txt', encoding='utf-8')  # show process cpu
            raw_text_data5 = input_file5.read()
            input_file5.close()

            template = open("show-version.textfsm")  # show version
            re_table = textfsm.TextFSM(template)
            fsm_results = re_table.ParseText(raw_text_data)

            template2 = open("show-env.textfsm")  # show env
            re_table2 = textfsm.TextFSM(template2)
            fsm_results2 = re_table2.ParseText(raw_text_data2)

            template3 = open("show-flash.textfsm")  # show flash
            re_table3 = textfsm.TextFSM(template3)
            fsm_results3 = re_table3.ParseText(raw_text_data3)

            template4 = open("show-memory-statistic.textfsm")  # show memory statistic
            re_table4 = textfsm.TextFSM(template4)
            fsm_results4 = re_table4.ParseText(raw_text_data4)

            template5 = open("show-process-cpu.textfsm")  # show process cpu
            re_table5 = textfsm.TextFSM(template5)
            fsm_results5 = re_table5.ParseText(raw_text_data5)

            outfile_name = open(nameFile + "-show-version.csv", "w+")  # show version
            outfile = outfile_name

            outfile_name2 = open(nameFile + "-show-env.csv", "w+")  # show env
            outfile2 = outfile_name2

            outfile_name3 = open(nameFile + "-show-flash.csv", "w+")  # show flash
            outfile3 = outfile_name3

            outfile_name4 = open(nameFile + "-show-memory-statistic.csv", "w+")  # show memory statistic
            outfile4 = outfile_name4

            outfile_name5 = open(nameFile + "-show-process-cpu.csv", "w+")  # show process cpu
            outfile5 = outfile_name5

            print(re_table.header)  # show version
            for s in re_table.header:
                outfile.write("%s;" % s)
            outfile.write("\n")

            counter = 0
            for row in fsm_results:  # show version
                print(row)
                for s in row:
                    outfile.write("%s;" % s)
                outfile.write("\n")
                counter += 1
            print("Write %d records" % counter)

            print(re_table2.header)  # show env
            for s in re_table2.header:
                outfile2.write("%s;" % s)
            outfile2.write("\n")

            counter = 0
            for row in fsm_results2:  # show env
                print(row)
                for s in row:
                    outfile2.write("%s;" % s)
                outfile2.write("\n")
                counter += 1
            print("Write %d records" % counter)

            print(re_table3.header)  # show flash
            for s in re_table3.header:
                outfile3.write("%s;" % s)
            outfile3.write("\n")

            counter = 0
            for row in fsm_results3:  # show flash
                print(row)
                for s in row:
                    outfile3.write("%s;" % s)
                outfile3.write("\n")
                counter += 1
            print("Write %d records" % counter)

            print(re_table4.header)  # show memory statistics
            for s in re_table4.header:
                outfile4.write("%s;" % s)
            outfile4.write("\n")

            counter = 0
            for row in fsm_results4:  # show memory statistics
                print(row)
                for s in row:
                    outfile4.write("%s;" % s)
                outfile4.write("\n")
                counter += 1
            print("Write %d records" % counter)

            print(re_table5.header)  # show process cpu
            for s in re_table5.header:
                outfile5.write("%s;" % s)
            outfile5.write("\n")

            counter = 0
            for row in fsm_results5:  # show process cpu
                print(row)
                for s in row:
                    outfile5.write("%s;" % s)
                outfile5.write("\n")
                counter += 1
            print("Write %d records" % counter)
        except IOError:
            print("Error: There Have File does not appear to exist.")
            QtGui.QMessageBox.question(self, 'Warning', "ERROR:Please check you're '.txt' file and TextFSM File.")


def run():
    app = QtGui.QApplication(sys.argv)
    GUI = Window()
    sys.exit(app.exec_())


run()

【问题讨论】：

如果有人有像我的帖子这样的例子，发给我..谢谢:)
您可以分享运行代码所需的文件。
drive.google.com/drive/folders/…...这是我的文件
试试我的解决方案。

标签： python pyqt pyqt4 qtextedit

【解决方案1】：

Python 生成的输出控制台写入程序输出流 sys.stdout（正常输出）和 sys.stderr（错误输出，例如异常回溯）。在这种情况下，我们将使用标准输出

class Stream(QtCore.QObject):
    newText = QtCore.pyqtSignal(str)

    def write(self, text):
        self.newText.emit(str(text))

class Window(QtGui.QMainWindow):
    def __init__(self):
        super(Window, self).__init__()
        self.setGeometry(50, 50, 500, 300)
        self.setWindowTitle("PyQT tuts!")
        self.setWindowIcon(QtGui.QIcon('pythonlogo.png'))
        self.home()

        sys.stdout = Stream(newText=self.onUpdateText)

    def onUpdateText(self, text):
        cursor = self.process.textCursor()
        cursor.movePosition(QtGui.QTextCursor.End)
        cursor.insertText(text)
        self.process.setTextCursor(cursor)
        self.process.ensureCursorVisible()

    def __del__(self):
        sys.stdout = sys.__stdout__

完整代码：

import sys
from PyQt4 import QtGui, QtCore
import jtextfsm as textfsm


class Stream(QtCore.QObject):
    newText = QtCore.pyqtSignal(str)

    def write(self, text):
        self.newText.emit(str(text))

class Window(QtGui.QMainWindow):
    def __init__(self):
        super(Window, self).__init__()
        self.setGeometry(50, 50, 500, 300)
        self.setWindowTitle("PyQT tuts!")
        self.setWindowIcon(QtGui.QIcon('pythonlogo.png'))
        self.home()

        sys.stdout = Stream(newText=self.onUpdateText)

    def onUpdateText(self, text):
        cursor = self.process.textCursor()
        cursor.movePosition(QtGui.QTextCursor.End)
        cursor.insertText(text)
        self.process.setTextCursor(cursor)
        self.process.ensureCursorVisible()

    def __del__(self):
        sys.stdout = sys.__stdout__

    def home(self):

        w = QtGui.QWidget()
        self.setCentralWidget(w)
        lay = QtGui.QVBoxLayout(w)
        btn = QtGui.QPushButton("Generate")
        btn.clicked.connect(self.TextFSM)

        self.process  = QtGui.QTextEdit()
        self.process.moveCursor(QtGui.QTextCursor.Start)
        self.process.ensureCursorVisible()
        self.process.setLineWrapColumnOrWidth(500)
        self.process.setLineWrapMode(QtGui.QTextEdit.FixedPixelWidth)

        lay.addWidget(btn)
        lay.addWidget(self.process)

        self.show()

    def TextFSM(self):

        nameFile = 'Switch'

        try:
            input_file = open(nameFile + '.txt', encoding='utf-8')  # show version
            raw_text_data = input_file.read()
            input_file.close()

            input_file2 = open(nameFile + '.txt', encoding='utf-8')  # show env
            raw_text_data2 = input_file2.read()
            input_file2.close()

            input_file3 = open(nameFile + '.txt', encoding='utf-8')  # show flash
            raw_text_data3 = input_file3.read()
            input_file3.close()

            input_file4 = open(nameFile + '.txt', encoding='utf-8')  # show memory statistic
            raw_text_data4 = input_file4.read()
            input_file4.close()

            input_file5 = open(nameFile + '.txt', encoding='utf-8')  # show process cpu
            raw_text_data5 = input_file5.read()
            input_file5.close()

            template = open("show-version.textfsm")  # show version
            re_table = textfsm.TextFSM(template)
            fsm_results = re_table.ParseText(raw_text_data)

            template2 = open("show-env.textfsm")  # show env
            re_table2 = textfsm.TextFSM(template2)
            fsm_results2 = re_table2.ParseText(raw_text_data2)

            template3 = open("show-flash.textfsm")  # show flash
            re_table3 = textfsm.TextFSM(template3)
            fsm_results3 = re_table3.ParseText(raw_text_data3)

            template4 = open("show-memory-statistic.textfsm")  # show memory statistic
            re_table4 = textfsm.TextFSM(template4)
            fsm_results4 = re_table4.ParseText(raw_text_data4)

            template5 = open("show-process-cpu.textfsm")  # show process cpu
            re_table5 = textfsm.TextFSM(template5)
            fsm_results5 = re_table5.ParseText(raw_text_data5)

            outfile_name = open(nameFile + "-show-version.csv", "w+")  # show version
            outfile = outfile_name

            outfile_name2 = open(nameFile + "-show-env.csv", "w+")  # show env
            outfile2 = outfile_name2

            outfile_name3 = open(nameFile + "-show-flash.csv", "w+")  # show flash
            outfile3 = outfile_name3

            outfile_name4 = open(nameFile + "-show-memory-statistic.csv", "w+")  # show memory statistic
            outfile4 = outfile_name4

            outfile_name5 = open(nameFile + "-show-process-cpu.csv", "w+")  # show process cpu
            outfile5 = outfile_name5

            print(re_table.header)  # show version
            for s in re_table.header:
                outfile.write("%s;" % s)
            outfile.write("\n")

            counter = 0
            for row in fsm_results:  # show version
                print(row)
                for s in row:
                    outfile.write("%s;" % s)
                outfile.write("\n")
                counter += 1
            print("Write %d records" % counter)

            print(re_table2.header)  # show env
            for s in re_table2.header:
                outfile2.write("%s;" % s)
            outfile2.write("\n")

            counter = 0
            for row in fsm_results2:  # show env
                print(row)
                for s in row:
                    outfile2.write("%s;" % s)
                outfile2.write("\n")
                counter += 1
            print("Write %d records" % counter)

            print(re_table3.header)  # show flash
            for s in re_table3.header:
                outfile3.write("%s;" % s)
            outfile3.write("\n")

            counter = 0
            for row in fsm_results3:  # show flash
                print(row)
                for s in row:
                    outfile3.write("%s;" % s)
                outfile3.write("\n")
                counter += 1
            print("Write %d records" % counter)

            print(re_table4.header)  # show memory statistics
            for s in re_table4.header:
                outfile4.write("%s;" % s)
            outfile4.write("\n")

            counter = 0
            for row in fsm_results4:  # show memory statistics
                print(row)
                for s in row:
                    outfile4.write("%s;" % s)
                outfile4.write("\n")
                counter += 1
            print("Write %d records" % counter)

            print(re_table5.header)  # show process cpu
            for s in re_table5.header:
                outfile5.write("%s;" % s)
            outfile5.write("\n")

            counter = 0
            for row in fsm_results5:  # show process cpu
                print(row)
                for s in row:
                    outfile5.write("%s;" % s)
                outfile5.write("\n")
                counter += 1
            print("Write %d records" % counter)
        except IOError:
            print("Error: There Have File does not appear to exist.")
            QtGui.QMessageBox.question(self, 'Warning', "ERROR:Please check you're '.txt' file and TextFSM File.")


def run():
    app = QtGui.QApplication(sys.argv)
    GUI = Window()
    sys.exit(app.exec_())


run()

截图：

【讨论】：

如果我有另一个像上面的例子一样运行类似输出的函数，它会自动添加到 QLineText 中吗？
没错，你打印的所有输出都会发送到QTextEdit
Ok"，它工作得很好..谢谢顺便说一句，我以前的帖子知道如何计算所需的时间（每个任务）..我用时间来计算它运行了多长时间..对吗？

【解决方案2】：

我建议在eyllanesc's answer 中添加一个附加函数以将标准输出恢复为默认值。那么关闭应用程序就不会弹出任何错误了。

def closeEvent(self, event):
    """Shuts down application on close."""
    # Return standard output to defaults.
    sys.stdout = sys.__stdout__
    super().closeEvent(event)

【讨论】：