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feat: add PySimpleGUI calculator & notepad GUI demo scripts by zhouzihanzzz · Pull Request #115 · trekhleb/learn-python · GitHub
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feat: add PySimpleGUI calculator & notepad GUI demo scripts #115

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feat: add PySimpleGUI calculator & notepad GUI demo scripts #115

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feat: add PySimpleGUI calculator & notepad GUI demo scripts
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@zhouzihanzzz
zhouzihanzzz committed Jun 8, 2026
commit 052b5e98da508e42e82202da0d7e44e1cfba34be
29 changes: 29 additions & 0 deletions src/Demo_Calculator_Simple.py
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import PySimpleGUI as sg

# 界面布局
layout = [
[sg.Input(key='input', size=(20,1)), sg.Button('C')],
[sg.Button('1'),sg.Button('2'),sg.Button('3'),sg.Button('+')],
[sg.Button('4'),sg.Button('5'),sg.Button('6'),sg.Button('-')],
[sg.Button('7'),sg.Button('8'),sg.Button('9'),sg.Button('*')],
[sg.Button('0'),sg.Button('.'),sg.Button('/'),sg.Button('=')]
]
window = sg.Window('简易计算器', layout)
expr = ''
while True:
event, val = window.read()
if event in (None, 'Exit'):
break
if event == 'C':
expr = ''
window['input'].update('')
elif event == '=':
try:
res = eval(expr)
window['input'].update(str(res))
except:
window['input'].update('Error')
else:
expr += event
window['input'].update(expr)
window.close()
36 changes: 36 additions & 0 deletions src/Demo_Notepad_Simple.py
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import PySimpleGUI as sg

# 窗口布局
layout = [
[sg.Text("简易记事本")],
[sg.Multiline(size=(60, 20), key="-TEXT-")],
[
sg.Button("保存文件"),
sg.Button("读取文件"),
sg.Button("清空"),
sg.Button("退出")
]
]

window = sg.Window("记事本", layout)

while True:
event, values = window.read()
if event in (sg.WIN_CLOSED, "退出"):
break
if event == "清空":
window["-TEXT-"].update("")
elif event == "保存文件":
path = sg.popup_get_file("保存文件", save_as=True, file_types=(("文本文件", "*.txt"),))
if path:
with open(path, "w", encoding="utf-8") as f:
f.write(values["-TEXT-"])
sg.popup("保存成功！")
elif event == "读取文件":
path = sg.popup_get_file("读取文件", file_types=(("文本文件", "*.txt"),))
if path:
with open(path, "r", encoding="utf-8") as f:
content = f.read()
window["-TEXT-"].update(content)

window.close()