PyQt5 无法获取功能和 类 正确
PyQt5 cannot get function and classes right
您好，需要帮助了解为什么不起作用认为是概念性的，但我无法理解。
我有一些文件：
main.py :
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Wed Apr 8 14:25:12 2020
@author: Pietro
"""
import sys
from PyQt5 import QtWidgets, uic, QtCore, QtGui
from PyQt5.QtCore import QTimer, Qt
from inputgui import Inputgui
from checkstate import check_state
class Menu(QtWidgets.QMainWindow):
def __init__(self):
super(Menu, self).__init__()
uic.loadUi('main2.ui', self)
self.setFixedSize(544,686)
self.show()
self.ButtonC.clicked.connect(self.inputs)
def inputs(self):
self.hide()
self.inputguiwin=Inputgui()
self.inputguiwin.show()
self.validator = QtGui.QIntValidator()
self.inputguiwin.annualsalaryinput.setValidator(self.validator)
self.inputguiwin.annualsalaryinput.textChanged.connect(self.check_state)
self.inputguiwin.annualsalaryinput.textChanged.emit(self.inputguiwin.annualsalaryinput.text())
self.inputguiwin.pushButtonOK.clicked.connect(self.qpushButtonOKpressed)
self.inputguiwin.pushButtonCANCEL.clicked.connect(self.pushButtonCANCELpressed)
# def check_state(self):
# sender = self.sender()
# validator = sender.validator()
# state = validator.validate(sender.text(), 0)[0]
# if state == QtGui.QIntValidator.Acceptable:
# color = 'green'
# elif state == QtGui.QIntValidator.Intermediate:
# color = 'yellow'
# else:
# color = 'red'
# sender.setStyleSheet('QLineEdit { background-color: %s }' % color)
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
window=Menu()
sys.exit(app.exec_())
inputgui.py :
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Tue Apr 14 10:40:44 2020
@author: bob
"""
import sys
from PyQt5 import QtWidgets, uic, QtCore
import resource
class Inputgui(QtWidgets.QMainWindow):
def __init__(self):
super(Inputgui, self).__init__()
uic.loadUi('inputgui2.ui', self)
self.setFixedSize(904,661)
print('inside inputgui ' *5)
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
pollo=Inputgui()
sys.exit(app.exec_())
checkstate.py :
#!/usr/bin/env python2
# -*- coding: utf-8 -*-
"""
Created on Sun Apr 19 20:28:32 2020
@author: bob
"""
import sys
from PyQt5 import QtWidgets, uic, QtCore, QtGui
from PyQt5.QtCore import QTimer, Qt
def check_state(self):
sender = self.sender()
validator = sender.validator()
state = validator.validate(sender.text(), 0)[0]
if state == QtGui.QIntValidator.Acceptable:
color = 'green'
elif state == QtGui.QIntValidator.Intermediate:
color = 'yellow'
else:
color = 'red'
sender.setStyleSheet('QLineEdit { background-color: %s }' % color)
main2.ui :
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="windowModality">
<enum>Qt::WindowModal</enum>
</property>
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>487</width>
<height>415</height>
</rect>
</property>
<property name="windowTitle">
<string>MainWindow</string>
</property>
<property name="windowIcon">
<iconset>
<normaloff>:/main/python.png</normaloff>
<normalon>:/main/python.png</normalon>
<disabledoff>:/main/python.png</disabledoff>
<disabledon>:/main/python.png</disabledon>
<activeoff>:/main/python.png</activeoff>
<activeon>:/main/python.png</activeon>
<selectedoff>:/main/python.png</selectedoff>
<selectedon>:/main/python.png</selectedon>:/main/python.png</iconset>
</property>
<property name="styleSheet">
<string notr="true"/>
</property>
<widget class="QWidget" name="centralwidget">
<widget class="QPushButton" name="ButtonC">
<property name="geometry">
<rect>
<x>150</x>
<y>110</y>
<width>151</width>
<height>81</height>
</rect>
</property>
<property name="font">
<font>
<pointsize>20</pointsize>
<weight>75</weight>
<bold>true</bold>
</font>
</property>
<property name="text">
<string>C</string>
</property>
</widget>
</widget>
<widget class="QMenuBar" name="menubar">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>487</width>
<height>29</height>
</rect>
</property>
</widget>
<widget class="QStatusBar" name="statusbar"/>
</widget>
<resources/>
<connections/>
</ui>
inputgui2.ui :
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="windowModality">
<enum>Qt::WindowModal</enum>
</property>
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>422</width>
<height>276</height>
</rect>
</property>
<property name="windowTitle">
<string>MainWindow</string>
</property>
<property name="layoutDirection">
<enum>Qt::LeftToRight</enum>
</property>
<property name="autoFillBackground">
<bool>true</bool>
</property>
<property name="styleSheet">
<string notr="true">QPushButton#pushButtonOK{
background-color: #9de650;
}
QPushButton:hover#pushButtonOK{
background-color: green;
}
QPushButton#pushButtonCANCEL{
background-color: orange;
}
QPushButton:hover#pushButtonCANCEL{
background-color: red;
}
</string>
</property>
<widget class="QWidget" name="centralwidget">
<widget class="QLineEdit" name="annualsalaryinput">
<property name="geometry">
<rect>
<x>80</x>
<y>80</y>
<width>131</width>
<height>51</height>
</rect>
</property>
<property name="contextMenuPolicy">
<enum>Qt::DefaultContextMenu</enum>
</property>
<property name="layoutDirection">
<enum>Qt::RightToLeft</enum>
</property>
<property name="text">
<string> Annual Salary</string>
</property>
<property name="alignment">
<set>Qt::AlignCenter</set>
</property>
<property name="clearButtonEnabled">
<bool>true</bool>
</property>
</widget>
<widget class="QLabel" name="annualsalarylabel">
<property name="geometry">
<rect>
<x>230</x>
<y>90</y>
<width>151</width>
<height>41</height>
</rect>
</property>
<property name="text">
<string> Annual Salary</string>
</property>
</widget>
<widget class="QLabel" name="titlelabel">
<property name="geometry">
<rect>
<x>210</x>
<y>0</y>
<width>471</width>
<height>71</height>
</rect>
</property>
<property name="font">
<font>
<pointsize>16</pointsize>
<weight>75</weight>
<bold>true</bold>
<underline>true</underline>
</font>
</property>
<property name="styleSheet">
<string notr="true"/>
</property>
<property name="text">
<string/>
</property>
<property name="alignment">
<set>Qt::AlignCenter</set>
</property>
</widget>
</widget>
<widget class="QMenuBar" name="menubar">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>422</width>
<height>29</height>
</rect>
</property>
</widget>
<widget class="QStatusBar" name="statusbar"/>
</widget>
<resources/>
<connections/>
</ui>
我从网上复制了这个例子：
先开window,
按钮C，
打开新 window,
只能插入整数（QIntValidator），
尝试插入输入 QLineEdit 背景时更改颜色。
问题是我无法在外部文件上获取 check_state() 函数。
为了让它工作，我需要将它放在 main.py 文件中（将 # 添加到 from checkstate import check_state
并从 main.py 上的 def check_state 中删除 ####)
为什么我无法从外部文件中获取函数？？
另一方面，为什么 QIntValidator 会阻止我的退格（backcancel）键盘键工作？
您有 2 个错误：
sender() 方法属于 QObject，显然 "check_state" 不属于任何 class，更不用说 QObject 了。
"self.check_state" 表示 class 有 check_state 这显然不是真的。
因此您将不得不不使用 sender() 而是通过 lambda 函数传递对象来实现逻辑（有关详细信息，请参阅 ）：
self.inputguiwin.annualsalaryinput.textChanged.connect(lambda text, sender=self.inputguiwin.annualsalaryinput: self.check_state(sender))
def check_state(sender):
validator = sender.validator()
state = validator.validate(sender.text(), 0)[0]
# ...
您好，需要帮助了解为什么不起作用认为是概念性的，但我无法理解。
我有一些文件：
main.py :
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Wed Apr 8 14:25:12 2020
@author: Pietro
"""
import sys
from PyQt5 import QtWidgets, uic, QtCore, QtGui
from PyQt5.QtCore import QTimer, Qt
from inputgui import Inputgui
from checkstate import check_state
class Menu(QtWidgets.QMainWindow):
def __init__(self):
super(Menu, self).__init__()
uic.loadUi('main2.ui', self)
self.setFixedSize(544,686)
self.show()
self.ButtonC.clicked.connect(self.inputs)
def inputs(self):
self.hide()
self.inputguiwin=Inputgui()
self.inputguiwin.show()
self.validator = QtGui.QIntValidator()
self.inputguiwin.annualsalaryinput.setValidator(self.validator)
self.inputguiwin.annualsalaryinput.textChanged.connect(self.check_state)
self.inputguiwin.annualsalaryinput.textChanged.emit(self.inputguiwin.annualsalaryinput.text())
self.inputguiwin.pushButtonOK.clicked.connect(self.qpushButtonOKpressed)
self.inputguiwin.pushButtonCANCEL.clicked.connect(self.pushButtonCANCELpressed)
# def check_state(self):
# sender = self.sender()
# validator = sender.validator()
# state = validator.validate(sender.text(), 0)[0]
# if state == QtGui.QIntValidator.Acceptable:
# color = 'green'
# elif state == QtGui.QIntValidator.Intermediate:
# color = 'yellow'
# else:
# color = 'red'
# sender.setStyleSheet('QLineEdit { background-color: %s }' % color)
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
window=Menu()
sys.exit(app.exec_())
inputgui.py :
#!/usr/bin/env python3
# -*- coding: utf-8 -*-
"""
Created on Tue Apr 14 10:40:44 2020
@author: bob
"""
import sys
from PyQt5 import QtWidgets, uic, QtCore
import resource
class Inputgui(QtWidgets.QMainWindow):
def __init__(self):
super(Inputgui, self).__init__()
uic.loadUi('inputgui2.ui', self)
self.setFixedSize(904,661)
print('inside inputgui ' *5)
if __name__ == '__main__':
app = QtWidgets.QApplication(sys.argv)
pollo=Inputgui()
sys.exit(app.exec_())
checkstate.py :
#!/usr/bin/env python2
# -*- coding: utf-8 -*-
"""
Created on Sun Apr 19 20:28:32 2020
@author: bob
"""
import sys
from PyQt5 import QtWidgets, uic, QtCore, QtGui
from PyQt5.QtCore import QTimer, Qt
def check_state(self):
sender = self.sender()
validator = sender.validator()
state = validator.validate(sender.text(), 0)[0]
if state == QtGui.QIntValidator.Acceptable:
color = 'green'
elif state == QtGui.QIntValidator.Intermediate:
color = 'yellow'
else:
color = 'red'
sender.setStyleSheet('QLineEdit { background-color: %s }' % color)
main2.ui :
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="windowModality">
<enum>Qt::WindowModal</enum>
</property>
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>487</width>
<height>415</height>
</rect>
</property>
<property name="windowTitle">
<string>MainWindow</string>
</property>
<property name="windowIcon">
<iconset>
<normaloff>:/main/python.png</normaloff>
<normalon>:/main/python.png</normalon>
<disabledoff>:/main/python.png</disabledoff>
<disabledon>:/main/python.png</disabledon>
<activeoff>:/main/python.png</activeoff>
<activeon>:/main/python.png</activeon>
<selectedoff>:/main/python.png</selectedoff>
<selectedon>:/main/python.png</selectedon>:/main/python.png</iconset>
</property>
<property name="styleSheet">
<string notr="true"/>
</property>
<widget class="QWidget" name="centralwidget">
<widget class="QPushButton" name="ButtonC">
<property name="geometry">
<rect>
<x>150</x>
<y>110</y>
<width>151</width>
<height>81</height>
</rect>
</property>
<property name="font">
<font>
<pointsize>20</pointsize>
<weight>75</weight>
<bold>true</bold>
</font>
</property>
<property name="text">
<string>C</string>
</property>
</widget>
</widget>
<widget class="QMenuBar" name="menubar">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>487</width>
<height>29</height>
</rect>
</property>
</widget>
<widget class="QStatusBar" name="statusbar"/>
</widget>
<resources/>
<connections/>
</ui>
inputgui2.ui :
<?xml version="1.0" encoding="UTF-8"?>
<ui version="4.0">
<class>MainWindow</class>
<widget class="QMainWindow" name="MainWindow">
<property name="windowModality">
<enum>Qt::WindowModal</enum>
</property>
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>422</width>
<height>276</height>
</rect>
</property>
<property name="windowTitle">
<string>MainWindow</string>
</property>
<property name="layoutDirection">
<enum>Qt::LeftToRight</enum>
</property>
<property name="autoFillBackground">
<bool>true</bool>
</property>
<property name="styleSheet">
<string notr="true">QPushButton#pushButtonOK{
background-color: #9de650;
}
QPushButton:hover#pushButtonOK{
background-color: green;
}
QPushButton#pushButtonCANCEL{
background-color: orange;
}
QPushButton:hover#pushButtonCANCEL{
background-color: red;
}
</string>
</property>
<widget class="QWidget" name="centralwidget">
<widget class="QLineEdit" name="annualsalaryinput">
<property name="geometry">
<rect>
<x>80</x>
<y>80</y>
<width>131</width>
<height>51</height>
</rect>
</property>
<property name="contextMenuPolicy">
<enum>Qt::DefaultContextMenu</enum>
</property>
<property name="layoutDirection">
<enum>Qt::RightToLeft</enum>
</property>
<property name="text">
<string> Annual Salary</string>
</property>
<property name="alignment">
<set>Qt::AlignCenter</set>
</property>
<property name="clearButtonEnabled">
<bool>true</bool>
</property>
</widget>
<widget class="QLabel" name="annualsalarylabel">
<property name="geometry">
<rect>
<x>230</x>
<y>90</y>
<width>151</width>
<height>41</height>
</rect>
</property>
<property name="text">
<string> Annual Salary</string>
</property>
</widget>
<widget class="QLabel" name="titlelabel">
<property name="geometry">
<rect>
<x>210</x>
<y>0</y>
<width>471</width>
<height>71</height>
</rect>
</property>
<property name="font">
<font>
<pointsize>16</pointsize>
<weight>75</weight>
<bold>true</bold>
<underline>true</underline>
</font>
</property>
<property name="styleSheet">
<string notr="true"/>
</property>
<property name="text">
<string/>
</property>
<property name="alignment">
<set>Qt::AlignCenter</set>
</property>
</widget>
</widget>
<widget class="QMenuBar" name="menubar">
<property name="geometry">
<rect>
<x>0</x>
<y>0</y>
<width>422</width>
<height>29</height>
</rect>
</property>
</widget>
<widget class="QStatusBar" name="statusbar"/>
</widget>
<resources/>
<connections/>
</ui>
我从网上复制了这个例子： 先开window, 按钮C， 打开新 window, 只能插入整数（QIntValidator）， 尝试插入输入 QLineEdit 背景时更改颜色。
问题是我无法在外部文件上获取 check_state() 函数。 为了让它工作，我需要将它放在 main.py 文件中（将 # 添加到 from checkstate import check_state 并从 main.py 上的 def check_state 中删除 ####) 为什么我无法从外部文件中获取函数？？
另一方面，为什么 QIntValidator 会阻止我的退格（backcancel）键盘键工作？
您有 2 个错误：
sender() 方法属于 QObject，显然 "check_state" 不属于任何 class，更不用说 QObject 了。
"self.check_state" 表示 class 有 check_state 这显然不是真的。
因此您将不得不不使用 sender() 而是通过 lambda 函数传递对象来实现逻辑（有关详细信息，请参阅
self.inputguiwin.annualsalaryinput.textChanged.connect(lambda text, sender=self.inputguiwin.annualsalaryinput: self.check_state(sender))
def check_state(sender):
validator = sender.validator()
state = validator.validate(sender.text(), 0)[0]
# ...