Question

当我按下按钮

时，我有这样的输出

[＆＃39; VERSION＆＃39;，＆＃39; ROMMON＆＃39;，＆＃39; HOSTNAME＆＃39;，＆＃39; UPTIME＆＃39;，＆＃39; RUNNING_IMAGE＆＃39;，   ＆＃39; HARDWARE＆＃39;，＆＃39; SERIAL＆＃39;，＆＃39; CONFIG_REGISTER＆＃39;]

[＆＃39; 12.2（55）SE7＆＃39;，＆＃39; Bootstrap＆＃39;，＆＃39; Revo-Solusindo-01＆＃39;，＆＃39; 1小时，27   分钟＆＃39; c2960s-universalk9-mz.122-55.SE7.bin＆＃39;，   [＆＃39; WS-C2960S-24PD-L＆＃39;]，[＆＃39; FOC1644Z129＆＃39;]，＆＃39; 0xF＆＃39;]发表1条记录

[＆＃39; FAN＆＃39;，＆＃39; TEMPERATURE＆＃39;，＆＃39; TEMPERATURE_VALUE＆＃39;，＆＃39; TEMPERATURE_STATE＆＃39;，   ＆＃39; YELLOW_THRESHOLD＆＃39; RED_THRESHOLD＆＃39;，＆＃39; POWER＆＃39;，＆＃39; RPS＆＃39;]

[＆＃39;好的＆＃39;，＆＃39;好的＆＃39;，＆＃39; 33＆＃39;，＆＃39; GREEN＆＃39;，＆＃39; 54＆＃39;，＆＃39; 64＆＃39;，＆＃39;＆＃39;，＆＃39;＆＃39;]写1条记录

[＆＃39; TOTAL＆＃39;，＆＃39; FFREE＆＃39;]

[＆＃39; 57931776＆＃39;，＆＃39; 29178368＆＃39;]

[＆＃39; 524288＆＃39;，＆＃39; 523212＆＃39;]写2条记录

[＆＃39; MEMTYPE＆＃39;，＆＃39; HEAD＆＃39;，＆＃39; TOTAL＆＃39;，＆＃39; USED＆＃39;，＆＃39; FREE＆＃39;，＆＃39;低＆＃39;，＆＃39;大＆＃39;]

[＆＃39;处理器＆＃39;，＆＃39; 2BA9598＆＃39;，＆＃39; 73910760＆＃39;，＆＃39; 26908308＆＃39;，＆＃39; 47002452＆＃39;，   ＆＃39; 45367928＆＃39;，＆＃39; 30211716＆＃39;]

[＆＃39; I / O＆＃39;，＆＃39; 6200000＆＃39;，＆＃39; 14680064＆＃39;，＆＃39; 12406764＆＃39;，＆＃39; 2273300＆＃39;，＆＃39; 2273300＆＃39 ;，   ＆＃39; 2273024＆＃39;]

[＆＃39; Driver te＆＃39;，＆＃39; 1A00000＆＃39;，＆＃39; 1048576＆＃39;，＆＃39; 44＆＃39;，＆＃39; 1048532＆＃39;，＆＃39; 1048532＆＃39 ;,   ＆＃39; 1048532＆＃39;]写3条记录

[＆＃39; CPU_5_SEC＆＃39;，＆＃39; CPU_1_MIN＆＃39;，＆＃39; CPU_5_MIN＆＃39;]

[＆＃39; 10＆＃39;，＆＃39; 10＆＃39;，＆＃39; 9＆＃39;]写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()

Answer 1

Python生成的输出控制台被写入程序输出流sys.stdout（正常输出）和sys.stderr（错误输出，例如异常追踪）。在这种情况下，我们将使用stdout

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()

<强>截图：

Answer 2

建议在上述答案中添加一个额外的函数，以将 stdout 返回到默认值。然后关闭应用就不会弹出错误了。

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

将python控制台输出打印到Qtextedit

2 个答案: