手把手教你使用PySimpleGUI库打造一款轻量级计算器

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前言

前几天在Python交流群里边，【🌑（这是月亮的背面）】大佬分享了一个有趣的代码，用于PySimpleGUI库打造了一款简易计算器，觉得挺有意思，非常适合入门PySimpleGUI的小伙伴们学习，这里拿出来给大家分享一波。

实现过程

这里直接上代码，如下所示：

代码语言：javascript
复制
import PySimpleGUI as sg

定义主窗口布局，确定行数


def window_main():

layout = [

[sg.Text('计算结果：', font=("微软雅黑", 10)), sg.Button('历史记录', font=("微软雅黑", 10), pad=(10, 1))],

[sg.Text('0', key='-express-', justification='right', size=(30, 1), font=("微软雅黑", 10), background_color='#fff', text_color='#000')],

[sg.Text('0', key='-result-', justification='right', size=(30, 1), font=("微软雅黑", 10), background_color='#fff', text_color='#000')],

[sg.Button('清空', size=(6, 2)), sg.Button('删除', size=(6, 2)), sg.Button('x²', size=(6, 2)), sg.Button('÷', size=(6, 2))],

[sg.Button('7', size=(6, 2)), sg.Button('8', size=(6, 2)), sg.Button('9', size=(6, 2)), sg.Button('x', size=(6, 2))],

[sg.Button('4', size=(6, 2)), sg.Button('5', size=(6, 2)), sg.Button('6', size=(6, 2)), sg.Button('-', size=(6, 2))],

[sg.Button('1', size=(6, 2)), sg.Button('2', size=(6, 2)), sg.Button('3', size=(6, 2)), sg.Button('+', size=(6, 2))],

[sg.Button('+/-', size=(6, 2)), sg.Button('0', size=(6, 2)), sg.Button('.', size=(6, 2)), sg.Button('=', size=(6, 2))],

]


# 创建窗口
return sg.Window('简易计算器@月亮', layout, finalize=True, default_element_size=(50, 1))



定义历史记录窗口布局


def createwindow_history(history_list=None):

history_text = ''

if history_list:

history_text = '\n'.join(['='.join(i) for i in history_list])

layout = [

[sg.Text('历史记录：', font=("微软雅黑", 10))],

[sg.Multiline(history_text, justification='right', disabled=True, autoscroll=True, size=(30, 10), font=("微软雅黑", 10), background_color='#fff', text_color='#000')]

]

return sg.Window('历史记录', layout, finalize=True)


def get_result(eval_str):

global result

eval_str = eval_str.replace('^', '**').replace('x', '*').replace('÷', '/')

try:

result = eval(eval_str)

except Exception as e:

result = '0'

window_main['-result-'].update(result)

return str(result)


window_main = window_main()

window_sub = None

history_list = []

express = '0'

result = '0'

flag = 0


while True:

window, event, value = sg.read_all_windows()

if window == window_main and event in (None, sg.WIN_CLOSED):

if window_sub is not None:

window_sub.close()

break

elif event == '历史记录':

if not window_sub:

window_sub = createwindow_history(history_list)

else:

window_sub.close()

window_sub = None

elif window == window_sub and event is None:

window_sub.close()

window_sub = None

elif event == '=':

express1 = express

express = get_result(express)

history_list.append([express1, express])

flag = 1

elif event == '清空':

express = '0'

result = '0'

window_main['-express-'].update(express)

window_main['-result-'].update(result)

elif event == '删除':

if len(express.lstrip('-').strip('(').strip(')')) == 1:

express = '0'

elif express[-1] == ')':

express = express.lstrip('-').strip('(').strip(')')

else:

express = express[:-1]

window_main['-express-'].update(express)

elif event == 'x²':

express = f'({express}) ^ 2'

window_main['-express-'].update(express)

elif event == '+/-':

express = f'-({express})'

get_result(express)

else:

if flag == 1 and event in '0123456789':

express = '0'

flag = 0

if express == '0':

express = event

else:

express = express + event

window_main['-express-'].update(express)


window.close()

代码运行之后，一款建议计算器就已经浮现在眼前了。

之后你可以自己做点简单的加减乘除等计算，都是可以的，也支持清除，查看历史记录功能等等。

总结

大家好，我是Python进阶者。这篇文章主要基于PySimpleGUI库，打造了一款轻量级计算器，实现计算器的相关功能。

最后感谢【🌑（这是月亮的背面）】大佬的代码分享，也欢迎大家积极尝试，有好的内容也可以分享给我噢！

#gui#python