Question

我的问题将在两个.py中使用： main.py：

from PyQt5.QtWidgets import *
from PyQt5.QtCore import *
from PyQt5.QtGui import *
from tag_pivot import *
from mainWindow import Ui_MainWindow
import sys

a = 'tag_'
b = 'pivot_'
c = 'STP_'
d = '_'
e = 'MTD_Level'
f = '()'
g = a+b+c+d+e+f
print(g)



class MainApp(QMainWindow, Ui_MainWindow):


    def slot_method(self):
        combo = self.comboBox.currentText()//combo is local variable as it is from self the GUI
        combo2 = self.comboBox_2.currentText()
        eval(a + b + combo + d + combo2 + f)
      

    def __init__(self):
        super(MainApp, self).__init__()
        self.setupUi(self)
        self.init_connections()


    def init_connections(self):
        self.pushButton.clicked.connect(self.slot_method)


def main():
    app = QApplication(sys.argv)
    ex = MainApp()
    ex.show()
    sys.exit(app.exec_())


if __name__ == '__main__':
    main()

mainWindow.py：

# -*- coding: utf-8 -*-

# Form implementation generated from reading ui file 'mainWindow.ui'
#
# Created by: PyQt5 UI code generator 5.15.1
#
# WARNING: Any manual changes made to this file will be lost when pyuic5 is
# run again.  Do not edit this file unless you know what you are doing.


from PyQt5 import QtCore, QtGui, QtWidgets
import sys


class Ui_MainWindow(object):
    def setupUi(self, MainWindow):
        MainWindow.setObjectName("MainWindow")
        MainWindow.resize(800, 600)
        self.centralwidget = QtWidgets.QWidget(MainWindow)
        self.centralwidget.setObjectName("centralwidget")
        self.comboBox = QtWidgets.QComboBox(self.centralwidget)
        self.comboBox.setGeometry(QtCore.QRect(100, 160, 111, 51))
        self.comboBox.setObjectName("comboBox")
        self.comboBox.addItem("")
        self.comboBox.addItem("")
        self.pushButton = QtWidgets.QPushButton(self.centralwidget)
        self.pushButton.setGeometry(QtCore.QRect(410, 152, 151, 51))
        self.pushButton.setObjectName("pushButton")
        self.comboBox_2 = QtWidgets.QComboBox(self.centralwidget)
        self.comboBox_2.setGeometry(QtCore.QRect(88, 281, 151, 71))
        self.comboBox_2.setObjectName("comboBox_2")
        self.comboBox_2.addItem("")
        self.comboBox_2.addItem("")
        self.comboBox_2.addItem("")
        MainWindow.setCentralWidget(self.centralwidget)
        self.menubar = QtWidgets.QMenuBar(MainWindow)
        self.menubar.setGeometry(QtCore.QRect(0, 0, 800, 21))
        self.menubar.setObjectName("menubar")
        MainWindow.setMenuBar(self.menubar)
        self.statusbar = QtWidgets.QStatusBar(MainWindow)
        self.statusbar.setObjectName("statusbar")
        MainWindow.setStatusBar(self.statusbar)

        self.retranslateUi(MainWindow)
        QtCore.QMetaObject.connectSlotsByName(MainWindow)

    def retranslateUi(self, MainWindow):
        _translate = QtCore.QCoreApplication.translate
        MainWindow.setWindowTitle(_translate("MainWindow", "MainWindow"))
        self.comboBox.setItemText(0, _translate("MainWindow", "STP_"))
        self.comboBox.setItemText(1, _translate("MainWindow", "MM_"))
        self.pushButton.setText(_translate("MainWindow", "PushButton"))
        self.comboBox_2.setItemText(0, _translate("MainWindow", "Intra_Level"))
        self.comboBox_2.setItemText(1, _translate("MainWindow", "MTD_Level"))
        self.comboBox_2.setItemText(2, _translate("MainWindow", "YTD_Level"))

if __name__ == "__main__":


    app = QtWidgets.QApplication(sys.argv)
    MainWindow = QtWidgets.QMainWindow()
    ui = Ui_MainWindow()
    ui.setupUi(MainWindow)
    MainWindow.show()
    sys.exit(app.exec_())

我的问题是我是否可以将组合（从self.comboBox.currentText（）引入）从局部变量更改为全局变量，因为我想将组合（字符串）分配给MainAPP类之外的其他函数。我不确定如何实现它，我假设其他人可能也有同样的问题，所以我将其发布在这里。如果我尝试在main（）中使用ex.combo：

def main():
    app = QApplication(sys.argv)
    ex = MainApp()
    gg = ex.combo
    ex.show()
    sys.exit(app.exec_())

系统告诉我：

Traceback (most recent call last):
  File "C:/Users/Michael Su/Desktop/Michael_python/Tag_pivot/main.py", line 86, in <module>
    main()
  File "C:/Users/Michael Su/Desktop/Michael_python/Tag_pivot/main.py", line 80, in main
    gg = ex.combo
AttributeError: 'MainApp' object has no attribute 'combo'

Process finished with exit code 1

Answer 1

尽管我不确定为什么函数的tag_pivot部分是必需的，但是如果您要做的只是打印特定值，为什么不直接从main中打印它们，而不是从long eval语句和其他函数中打印出来？

print(f"{c}{e}")  # prints STP_MTD

或者，如果您喜欢某个功能，专门用于打印：

def printer_function(*args):
    print("".join(args))

然后可以从main调用此函数，并提供要打印在一起的任何变量。例如

printer_function(c, e)  # prints STP_MTD

我希望这会有所帮助，但是如果您不是想打印的唯一功能，请告诉我。

使局部变量成为全局变量

1 个答案: