1 面向过程版

from PySide2.QtWidgets import QApplication, QMainWindow, QPushButton,  QPlainTextEdit, QMessageBox
def HandleCalc():
    info = textEdit.toPlainText()
    # 薪资20000 以上 和 以下 的人员名单
    salary_above_20k = ''
    salary_below_20k = ''
    for line in info.splitlines():
        # 去除首尾空白符后字符为空, 则跳过
        if not line.strip():    
            continue
        parts = line.split(' ')
        # 去掉列表中的空字符串内容
        parts = [p for p in parts if p]
        name, salary, age = parts
        if int(salary) >= 20000:
            salary_above_20k += name + '\n'
        else:
            salary_below_20k += name + '\n'
    QMessageBox.about(window,
                      '统计结果',
                      f'''薪资20000 以上的有：\n{salary_above_20k}
                    \n薪资20000 以下的有：\n{salary_below_20k}'''
                      )
app = QApplication()
window = QMainWindow()
window.resize(500, 400)
window.move(300, 310)
window.setWindowTitle('薪资统计')
textEdit = QPlainTextEdit(window)
textEdit.setPlaceholderText("请输入薪资表")
textEdit.move(10,25)
textEdit.resize(300,350)
button = QPushButton('统计', window)
button.move(380,80)
button.clicked.connect(HandleCalc)
window.show()
app.exec_()

2 面向对象版

from PySide2.QtWidgets import QApplication, QMainWindow, QPushButton,  QPlainTextEdit,QMessageBox
class Stats():
    def __init__(self):
        self.window = QMainWindow()
        self.window.resize(500, 400)
        self.window.move(300, 300)
        self.window.setWindowTitle('薪资统计')
        self.textEdit = QPlainTextEdit(self.window)
        self.textEdit.setPlaceholderText("请输入薪资表")
        self.textEdit.move(10, 25)
        self.textEdit.resize(300, 350)
        self.button = QPushButton('统计', self.window)
        self.button.move(380, 80)
        self.button.clicked.connect(self.handleCalc)
    def handleCalc(self):
        info = self.textEdit.toPlainText()
        # 薪资20000 以上 和 以下 的人员名单
        salary_above_20k = ''
        salary_below_20k = ''
        for line in info.splitlines():
            if not line.strip():
                continue
            parts = line.split(' ')
            # 去掉列表中的空字符串内容
            parts = [p for p in parts if p]
            name,salary,age = parts
            if int(salary) >= 20000:
                salary_above_20k += name + '\n'
            else:
                salary_below_20k += name + '\n'
        QMessageBox.about(self.window,
                    '统计结果',
                    f'''薪资20000 以上的有：\n{salary_above_20k}
                    \n薪资20000 以下的有：\n{salary_below_20k}'''
                    )
app = QApplication()
stats = Stats()
stats.window.show()
app.exec_()

3 使用QtDesigner创建UI界面

# 调用代码-动态加载UI界面
from PySide2.QtWidgets import QApplication, QMessageBox
from PySide2.QtUiTools import QUiLoader
class Stats():
    def __init__(self):
        # 从 UI 定义中动态 创建一个相应的窗口对象
        # 注意：里面的控件对象也成为窗口对象的属性了
        self.ui = QUiLoader().load("statsUI.ui")
        self.ui.btn_1.clicked.connect(self.handleCalc)
    def handleCalc(self):
        info = self.ui.pedt_1.toPlainText()
        salary_above_20k = ''
        salary_below_20k = ''
        for line in info.splitlines():
            if not line.strip():
                continue
            parts = line.split(' ')
            parts = [p for p in parts if p]
            name,salary,age = parts
            if int(salary) >= 20000:
                salary_above_20k += name + '\n'
            else:
                salary_below_20k += name + '\n'
        QMessageBox.about(self.ui,
                    '统计结果',
                    f'''薪资20000 以上的有：\n{salary_above_20k}
                    \n薪资20000 以下的有：\n{salary_below_20k}'''
                    )
app = QApplication()
stats = Stats()
stats.ui.show()
app.exec_()