"如何通过单击 QPushButton 在 QLineEdit 中输入输入，然后在 QLabel 中打印结果？"

Question

first of all, I want to completely explain what I'm going to do exactly. I have a simple script and I want to convert it to an executable file or whatever you call it but first I should start with interface stuff.

for i in range(4):
    a = False
    while not a:
        text = input("enter a word")
        
        # a condition for accepting input. I mean input should satisfy this condition
        if len(text) == 5:
            a = True
    
    # just print the word, simple and easy
    print(text)

Answer 1

I figured out the solution myself. I was totally wrong with signal implication when you click a QPushButton<\/code> ! and I figured out that a QLabel<\/code> can be updated using .setText()<\/code> ! so here is the solution:

from PyQt5.QtWidgets import QApplication , QWidget , QPushButton , QLabel , QLineEdit
import sys

app = QApplication(sys.argv)

class APP(QWidget):
    def __init__(self):
        super().__init__()

        self.button = QPushButton("Enter" , self)
        self.button.setGeometry(500 , 400 , 100 , 50)
        self.button.clicked.connect(self.clicked)
        self._submit_counter = 0
        
        self.button2 = QPushButton("RESET" , self)
        self.button2.setGeometry(500 , 600 , 100 , 50)
        self.button2.clicked.connect(self.reset_clicked)
        
        self.Line_edit()

        self.label = QLabel("place of ouput prints" , self)
        self.label.move(40 , 60)
        self.label.setGeometry(50 , 50 , 150 , 50)

    def Line_edit(self):
        self.input_text = QLineEdit(self)
        self.input_text.setPlaceholderText("Enter The Word")

    def reset_clicked(self):
        self._submit_counter = 0
    
    def clicked(self):

        if self._submit_counter<4:

            # if QLineEdit contains a word
            if self.input_text.text():
                
                text = self.input_text.text()

                # a condition for accepting input. I mean input should satisfy this condition
                if len(text) == 5:
                    
                    self._submit_counter += 1
                    # just print the word in QLable, simple and easy
                    self.label.setText(text)


window = APP()
window.show()
sys.exit(app.exec_())