Python从入门到精通的"HelloWorld!"程序

print("HelloWorld!")

def HelloWorld():
    print("HelloWorld!")
HelloWorld()

def HelloWorld():
    print("HelloWorld!")
if __name__ == '__main__':
    HelloWorld()

class HelloWorld():
    def __init__(self, text):
        self.text = text
    def print(self):
        print(self.text)
if __name__ == '__main__':
    p = HelloWorld("HelloWorld!")
    p.print()

from tkinter import messagebox

def main():
    messagebox.showinfo(title="title", message="HelloWorld!")

if __name__ == '__main__':
    main()

import wx

class HelloWorld(wx.Frame):
    def __init__(self, *args, **kwargs):
        super(HelloWorld, self).__init__(*args, **kwargs)
        self.InitUI()

    def InitUI(self):
        self.pnl = wx.Panel(self)
        self.st = wx.StaticText(self.pnl, label ="HelloWorld!")
        self.SetSize((350, 250))
        self.SetTitle('HelloWorld')

def main():
    app = wx.App()
    p = HelloWorld(None)
    p.Show()
    app.MainLoop()

if __name__ == '__main__':
    main()

from PyQt5.QtWidgets import QApplication, QWidget, QLabel, QGridLayout
import sys

class Window(QWidget):

    def __init__(self):
        super().__init__()
        self.resize(300, 300)
        self.setWindowTitle("HelloWorld")
        s = QLabel('HelloWorld!')
        grid = QGridLayout()
        grid.addWidget(s, 1, 0)
        self.setLayout(grid)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    win = Window()
    win.show()
    sys.exit(app.exec_())

from PyQt5.QtWidgets import QApplication, QWidget
from PyQt5.QtWidgets import QPushButton, QToolTip, QMessageBox
from PyQt5.QtGui import QFont
import sys

class Window(QWidget):

    def __init__(self):
        super().__init__()
        self.resize(300, 300)
        self.setWindowTitle("HelloWorld")
        QToolTip.setFont(QFont('SansSerif', 10))
        btn = QPushButton('HelloWorld', self)
        btn.clicked.connect(self.helloworld)
        btn.setToolTip('<a href="HelloWorld">HelloWorld!</a>')
        btn.move(50, 50)

    def helloworld(self):
        QMessageBox.information(self, 'title', 'HelloWorld!', QMessageBox.Yes, QMessageBox.Yes)

if __name__ == '__main__':
    app = QApplication(sys.argv)
    win = Window()
    win.show()
    sys.exit(app.exec_())