如何正确地从QPlainTextEdit获取Unicode文本输入？ [英] How to correctly get Unicode text input from QPlainTextEdit?

问题描述

仅运行应用程序，我就在屏幕上的QPlainTextEdit区域上获得了正确的结果：

但是，当单击按钮开始仿真并使用 QPlainTextEdit.toPlainText（）恢复输入时， ），输出将无效：

  def handle_first_input_text（self）：
 textEdit = self.textEditWidget1.toPlainText（）
 print（％s，textEdit）
  

< a href = https://i.stack.imgur.com/XXDVk.png rel = nofollow noreferrer>

此外，当尝试从以下位置获取 Delta δ时，图像，抛出此错误：

 跟踪（最近一次调用最近）：
文件 main.p y，第57行，在handle_first_input_text 
 print（％s，textEdit）
文件 F：\Python\lib\encodings\cp1252.py，第19行，编码
返回codecs.charmap_encode（input，self.errors，encoding_table）[0] 
 UnicodeEncodeError： charmap编解码器无法对位置11处的字符 \u03b4进行编码：字符映射为< undefined> ; 
  

如何从 QPlainTextEdit ？这是错误的最小代码，只需点击开始仿真并查找控制台输出。

 ＃！ / usr / bin / env python 
＃-*-编码：utf-8-*-
 
 import sys 
 
 from PyQt5 import QtGui 
 from从PyQt5.QtGui导入PyQt5的QtWidgets 
 
 *从PyQt5.QtCore导入的
 *从PyQt5.QtWidgets导入的
 * 
 
 def main（）： 
 app = QtWidgets.QApplication（sys.argv）
 programWindow = ProgramWindow（）
 
 programWindow.show（）
 sys.exit（app.exec_（）） 
 
 
类ProgramWindow（QtWidgets.QMainWindow）：
 
 def __init __（self）：
 QtWidgets.QMainWindow .__ init __（self）
 self.setup_main_window（）
 self.first_input_text（）
 self.set_window_layout（）
 
 def setup_main_window（self）：
 self.resize（800，600）
 self.centralwidget = QWidget（）
 self.setCentralWidget（self.centralwidget）
 
 def first_input_text（self）：
 self.textEditWidget1 = QPlainTextEdit（self）
 self.startSimulationBu tton1 = QPushButton（开始模拟）
 
 self.textEditWidget1.document（）。setPlainText（＃编写δçéção）
 self.startSimulationButton1.clicked.connect（ self.handle_first_input_text）
 
 verticalInnerLayout = QVBoxLayout（）
 verticalInnerLayout.addWidget（self.startSimulationButton1）
 
 horizo​​ntalInnerLayout = QHBoxLayout（）
 horizo​​ntalInnerLayout.addLayout（ verticalInnerLayout）
 horizo​​ntalInnerLayout.addWidget（self.textEditWidget1）
 
 self.groupBox1 = QGroupBox（ First Group）
 self.groupBox1.setLayout（horizo​​ntalInnerLayout）
 
 def set_window_layout（self）：
 main_vertical_layout = QVBoxLayout（self.centralwidget）
 main_vertical_layout.addWidget（self.groupBox1）
 
 def handle_first_input_text（self）：
 textEdit = self.textEditWidget1.toPlainText（）
 print（％s，textEdit）
 
 if __name__ == __main__：
 main（）
  





---

答案

此问题不是

Just running the application I got the correct results on the QPlainTextEdit area on the screen:

But when clicking on the button Start Simulation and recovering the input from it with QPlainTextEdit.toPlainText(), the output goes invalid:

def handle_first_input_text(self):
    textEdit = self.textEditWidget1.toPlainText()
    print( "%s", textEdit )

Also, when trying to retrieve the Delta δ from the image, this error is throw up:

Traceback (most recent call last):
  File "main.py", line 57, in handle_first_input_text
    print( "%s", textEdit )
  File "F:\Python\lib\encodings\cp1252.py", line 19, in encode
    return codecs.charmap_encode(input,self.errors,encoding_table)[0]
UnicodeEncodeError: 'charmap' codec can't encode character '\u03b4' in position 11: character maps to <undefined>

How can I retrieve the input the correctly from the QPlainTextEdit? This is the minimal code for the error, just hit Start Simulation and look for the console output.

#! /usr/bin/env python
# -*- coding: utf-8 -*-

import sys

from PyQt5 import QtGui
from PyQt5 import QtWidgets

from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *

def main():
    app = QtWidgets.QApplication(sys.argv)
    programWindow = ProgramWindow()

    programWindow.show()
    sys.exit(app.exec_())


class ProgramWindow(QtWidgets.QMainWindow):

    def __init__(self):
        QtWidgets.QMainWindow.__init__(self)
        self.setup_main_window()
        self.first_input_text()
        self.set_window_layout()

    def setup_main_window(self):
        self.resize( 800, 600 )
        self.centralwidget = QWidget()
        self.setCentralWidget( self.centralwidget )

    def first_input_text(self):
        self.textEditWidget1 = QPlainTextEdit( self )
        self.startSimulationButton1 = QPushButton( "Start Simulation" )

        self.textEditWidget1.document().setPlainText( " # Writing δ some ç é ã õ")
        self.startSimulationButton1.clicked.connect( self.handle_first_input_text )

        verticalInnerLayout = QVBoxLayout()
        verticalInnerLayout.addWidget( self.startSimulationButton1 )

        horizontalInnerLayout = QHBoxLayout()
        horizontalInnerLayout.addLayout( verticalInnerLayout )
        horizontalInnerLayout.addWidget( self.textEditWidget1 )

        self.groupBox1 = QGroupBox( "First Group" )
        self.groupBox1.setLayout( horizontalInnerLayout )

    def set_window_layout(self):
        main_vertical_layout = QVBoxLayout( self.centralwidget )
        main_vertical_layout.addWidget( self.groupBox1 )

    def handle_first_input_text(self):
        textEdit = self.textEditWidget1.toPlainText()
        print( "%s", textEdit )

if __name__ == "__main__":
    main()

---

Answer

This question is not a duplicate of UnicodeEncodeError: 'charmap' codec can't encode characters

Also, none of these answers bellow are the answer to this question.

To fix this, I need to add

.encode("utf-8").decode('cp1252') 

and not only

.encode("utf-8")

This is the fixed version:

def handle_first_input_text(self):
    textEdit = self.textEditWidget1.toPlainText().encode("utf-8").decode('cp1252')
    print( "%s", textEdit )

Full code:

#! /usr/bin/env python
# -*- coding: utf-8 -*-

import sys

from PyQt5 import QtGui
from PyQt5 import QtWidgets

from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *

def main():
    app = QtWidgets.QApplication(sys.argv)
    programWindow = ProgramWindow()

    programWindow.show()
    sys.exit(app.exec_())


class ProgramWindow(QtWidgets.QMainWindow):

    def __init__(self):
        QtWidgets.QMainWindow.__init__(self)
        self.setup_main_window()
        self.first_input_text()
        self.set_window_layout()

    def setup_main_window(self):
        self.resize( 800, 600 )
        self.centralwidget = QWidget()
        self.setCentralWidget( self.centralwidget )

    def first_input_text(self):
        self.textEditWidget1 = QPlainTextEdit( self )
        self.startSimulationButton1 = QPushButton( "Start Simulation" )

        self.textEditWidget1.document().setPlainText( " # Writing δ some ç é ã õ")
        self.startSimulationButton1.clicked.connect( self.handle_first_input_text )

        verticalInnerLayout = QVBoxLayout()
        verticalInnerLayout.addWidget( self.startSimulationButton1 )

        horizontalInnerLayout = QHBoxLayout()
        horizontalInnerLayout.addLayout( verticalInnerLayout )
        horizontalInnerLayout.addWidget( self.textEditWidget1 )

        self.groupBox1 = QGroupBox( "First Group" )
        self.groupBox1.setLayout( horizontalInnerLayout )

    def set_window_layout(self):
        main_vertical_layout = QVBoxLayout( self.centralwidget )
        main_vertical_layout.addWidget( self.groupBox1 )

    def handle_first_input_text(self):
        textEdit = self.textEditWidget1.toPlainText().encode("utf-8").decode('cp1252')
        print( "%s", textEdit )

if __name__ == "__main__":
    main()

解决方案

Try it:

import sys
import os

from PyQt5 import QtGui
from PyQt5 import QtWidgets

from PyQt5.QtGui import *
from PyQt5.QtCore import *
from PyQt5.QtWidgets import *

def main():
    app = QtWidgets.QApplication(sys.argv)
    programWindow = ProgramWindow()

    programWindow.show()
    sys.exit(app.exec_())


class ProgramWindow(QtWidgets.QMainWindow):

    def __init__(self):
        QtWidgets.QMainWindow.__init__(self)
        self.setup_main_window()
        self.first_input_text()
        self.set_window_layout()

    def setup_main_window(self):
        self.resize( 800, 600 )
        self.centralwidget = QWidget()
        self.setCentralWidget( self.centralwidget )

    def first_input_text(self):
        self.textEditWidget1 = QPlainTextEdit( self )
        self.startSimulationButton1 = QPushButton( "Start Simulation" )

        self.textEditWidget1.document().setPlainText( " # Writing δ some ç é ã õ")
        self.startSimulationButton1.clicked.connect( self.handle_first_input_text )

        verticalInnerLayout = QVBoxLayout()
        verticalInnerLayout.addWidget( self.startSimulationButton1 )

        horizontalInnerLayout = QHBoxLayout()
        horizontalInnerLayout.addLayout( verticalInnerLayout )
        horizontalInnerLayout.addWidget( self.textEditWidget1 )

        self.groupBox1 = QGroupBox( "First Group" )
        self.groupBox1.setLayout( horizontalInnerLayout )

    def set_window_layout(self):
        main_vertical_layout = QVBoxLayout( self.centralwidget )
        main_vertical_layout.addWidget( self.groupBox1 )

    def handle_first_input_text(self):
        textEdit = self.textEditWidget1.toPlainText()
        #print( "%s" % textEdit)
        os.system('echo ' + textEdit)

if __name__ == "__main__":
    main()

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