Python写一个GUI界面的BMI计算器（使用PySimpleGUI）

先安装PySimpleGUI包

import PySimpleGUI as sg

def calc_bmi(h, w):
    try:
        h, w = float(h), float(w)
        bmi = round(w / h ** 2, 1)
        if bmi < 18.5:
            standard = \'体重过轻！\'
        elif 18.5 <= bmi <= 23.9:
            standard = \'体重正常！\'
        elif 24.0 <= bmi <= 27.9:
            standard = \'体重过重，注意饮食！\'
        else:
            standard = \'体重肥胖，注意饮食！\'
    except (ValueError, ZeroDivisionError):
        return None
    else:
        return f\'BMI: {bmi}, {standard}\'


layout = [[sg.Text(\'身高(单位：m )\'), sg.InputText(size=(15,))],
          [sg.Text(\'体重(单位：kg)\'), sg.InputText(size=(15,))],
          [sg.Button(\'计算 BMI\', key=\'submit\')],
          [sg.Text(\'\', key=\'bmi\', size=(20, 2))],
          [sg.Quit(\'退出\', key=\'q\')]]

window = sg.Window(\'BMI计算\', layout, font=\'微软雅黑\')

while True:
    event, value = window.Read()
    if event == \'submit\':
        bmi = calc_bmi(value[0], value[1])
        if bmi:
            window.Element(\'bmi\').Update(bmi, text_color=\'black\')
        else:
            window.Element(\'bmi\').Update(\'输入有误！\', text_color=\'red\')
    elif event == \'q\':
        break

window.Close()

运行结果：