无法从 Python 中的其他 class 获取值

Question

我尝试在其他 Class 中使用 Window1 中 txtbox 的值通过单击 Window1 中的按钮我试了100多种方法还是不行！当我单击按钮和时，如何在 Window1 中获取 txtbox 的值获取运行 callstock，在 callstock 中，我首先从 Window1 获取文本框的值注意：当我设置值“example”时代码工作正常但我无法从 class Window1

中获取该值

class Window1(QWidget):
    def __init__(self):
        super().__init__()
        self.setGeometry(550,200,500,500)
        self.setWindowTitle('program')
        self.UI()

    def UI(self):
        self.txtbox = QLineEdit(self)
        self.txtbox.move(150,10)
        self.txtbox.setPlaceholderText("name")
        btnfind = QPushButton("Find",self)
        btnfind.move(175,35)
        btnfind.clicked.connect(self.getValues)
        self.show()
    def sendval(self):
        txt = self.txtbox.text()
        return txt
    def getValues(self):
        self.newB = callstock()

class callstock(QWidget):
    def __init__(self):
        super().__init__()
        wi = Window1.sendval(self)
        self.setWindowTitle(wi)
        self.setGeometry(10,10,500,500)
        self.UI()
        self.figview1 = showchart1(name=wi,day=200)
        self.figview1.setGeometry(10,10,500,500)
        self.figview1.move(0,0)
        self.figview1.show()
    def UI(self):
        pass

def main():
    app = QApplication(sys.argv)
    window = Window1()
    sys.exit(app.exec_())

if __name__ == '__main__':
    main()

Answer 1

您必须将第一个 class 的实例作为参数发送到第二个 class - 在您的代码中它将是 self ，这意味着 Window1[=20 的实例=]

   self.newB = callstock(self)

第二个 class 必须得到它 - 即。作为 other_class

class callstock(QWidget):
    
    def __init__(self, other_class):    # <-- get instance in `other_class`
        super().__init__()
        
        wi = other_class.txtbox.text()  # <-- use it

最小工作代码：

from PyQt5.Qt import *

class Window1(QWidget):
    
    def __init__(self):
        super().__init__()
        self.setGeometry(550, 200, 500, 500)  # PEP8: space after comma
        self.setWindowTitle('program')
        self.UI()

    def UI(self):
        self.txtbox = QLineEdit(self)
        self.txtbox.move(150, 10)  # PEP8: space after comma
        self.txtbox.setPlaceholderText("name")
        
        btnfind = QPushButton(self, text="Find")  # PEP8: space after comma
        btnfind.move(175, 35)  # PEP8: space after comma
        btnfind.clicked.connect(self.getValues)
        
        self.show()

    def getValues(self):
        self.newB = CallStock(self)  # <-- send instance of `Window1` as argument


class CallStock(QWidget):  # PEP8: `CamelCaseName` for classes
    
    def __init__(self, other_class):    # <-- get instance in variable `other_class`
        super().__init__()
        
        wi = other_class.txtbox.text()  # <-- use it
        
        self.setWindowTitle(wi)
        self.setGeometry(10, 10, 500, 500)  # PEP8: space after comma
        self.UI()

        self.figview1 = QLabel(self, text="Text from Window1: " + wi)
        #self.figview1 = showchart1(name=wi, day=200)  # PEP8: space after comma
        self.figview1.setGeometry(10, 10, 500, 500)  # PEP8: space after comma
        self.figview1.move(0, 0)  # PEP8: space after comma
        self.figview1.show()
        
        self.show()
        
    def UI(self):
        pass

def main():
    app = QApplication([])
    window = Window1()
    app.exec()

if __name__ == '__main__':
    main()

PEP 8 -- Style Guide for Python Code

编辑：

您也可以只发送文本而不是完整实例

    self.newB = CallStock(self.txtbox.text())

和

class CallStock(QWidget):  # PEP8: `CamelCaseName` for classes
    
    def __init__(self, wi):  # <-- get text in variable `wi`

最小工作代码：

from PyQt5.Qt import *

class Window1(QWidget):
    
    def __init__(self):
        super().__init__()
        self.setGeometry(550, 200, 500, 500)  # PEP8: space after comma
        self.setWindowTitle('program')
        self.UI()

    def UI(self):
        self.txtbox = QLineEdit(self)
        self.txtbox.move(150, 10)  # PEP8: space after comma
        self.txtbox.setPlaceholderText("name")
        
        btnfind = QPushButton(self, text="Find")  # PEP8: space after comma
        btnfind.move(175, 35)  # PEP8: space after comma
        btnfind.clicked.connect(self.getValues)
        
        self.show()

    def getValues(self):
        self.newB = CallStock(self.txtbox.text())


class CallStock(QWidget):  # PEP8: `CamelCaseName` for classes
    
    def __init__(self, wi):
        super().__init__()
        
        self.setWindowTitle(wi)
        self.setGeometry(10, 10, 500, 500)  # PEP8: space after comma
        self.UI()

        self.figview1 = QLabel(self, text="Text from Window1: " + wi)
        #self.figview1 = showchart1(name=wi, day=200)  # PEP8: space after comma
        self.figview1.setGeometry(10, 10, 500, 500)  # PEP8: space after comma
        self.figview1.move(0, 0)  # PEP8: space after comma
        self.figview1.show()
        
        self.show()
        
    def UI(self):
        pass

def main():
    app = QApplication([])
    window = Window1()
    app.exec()

if __name__ == '__main__':
    main()

无法从 Python 中的其他 class 获取值

Cant Get values from other class in Python

python

pyqt

python-3.x

pyqt5