微信小程序选项卡功能开发步骤与方法全解析
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2023-11-08
Python开发桌面小程序功能
当使用桌面应用程序的时候，
有没有那么一瞬间，
想学习一下桌面应用程序开发？
建议此次课程大家稍作了解不要浪费太多时间，
因为没有哪家公司会招聘以为Python程序员开发桌面程序吧？开发环境：
Python 3.6Pycharm代码
界面设置
导入模块
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import tkinter as tk
实例化一个窗体对象
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root = tk.Tk()
标题
大小以及出现的位置
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root.geometry("295x280+150+150")
透明度
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root.attributes("-alpha", 0.9)
背景
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root["background"] = "#ffffff"
标签
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lable1 = tk.Label(root, textvariable=result_num, width=20, height=2, font=(宋体, 20), justify=left, background=#ffffff, anchor=se)
布局
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lable1.grid(padx=4, pady=4, row=0, column=0, columnspan=4)
按钮
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button_clear = tk.Button(root, text=C, width=5, font=(宋体, 16), relief=flat, background=#C0C0C0, command=lambda: clear())
button_back = tk.Button(root, text=←, width=5, font=(宋体, 16), relief=flat, background=#C0C0C0, command=lambda: back())
button_division = tk.Button(root, text=/, width=5, font=(宋体, 16), relief=flat, background=#C0C0C0, command=lambda: operator(/))
button_multiplication = tk.Button(root, text=x, width=5, font=(宋体, 16), relief=flat, background=#C0C0C0, command=lambda: operator(*))
button_clear .grid(padx=4, row=1, column=0)
button_back .grid(padx=4, row=1, column=1)
button_division .grid(padx=4, row=1, column=2)
button_multiplication .grid(padx=4, row=1, column=3)
button_seven = tk.Button(root, text=7, width=5, font=(宋体, 16), relief=flat, background=#FFDEAD, command=lambda: append_num(7))
button_eight = tk.Button(root, text=8, width=5, font=(宋体, 16), relief=flat, background=#FFDEAD, command=lambda: append_num(8))
button_nine = tk.Button(root, text=9, width=5, font=(宋体, 16), relief=flat, background=#FFDEAD, command=lambda: append_num(9))
button_subtraction = tk.Button(root, text=—, width=5, font=(宋体, 16), relief=flat, background=#C0C0C0, command=lambda: operator(-))
button_seven .grid(padx=4, row=2, column=0)
button_eight .grid(padx=4, row=2, column=1)
button_nine .grid(padx=4, row=2, column=2)
button_subtraction .grid(padx=4, row=2, column=3)
button_four = tk.Button(root, text=4, width=5, font=(宋体, 16), relief=flat, background=#FFDEAD, command=lambda: append_num(4))
button_four.grid(padx=4, pady=4, row=3, column=0)
button_five = tk.Button(root, text=5, width=5, font=(宋体, 16), relief=flat, background=#FFDEAD, command=lambda: append_num(5))
button_five.grid(padx=4, row=3, column=1)
button_six = tk.Button(root, text=6, width=5, font=(宋体, 16), relief=flat, background=#FFDEAD, command=lambda: append_num(6))
button_six.grid(padx=4, row=3, column=2)
button_addition = tk.Button(root, text=+, width=5, font=(宋体, 16), relief=flat, background=#C0C0C0, command=lambda: operator(+))
button_addition.grid(padx=4, row=3, column=3)
button_one = tk.Button(root, text=1, width=5, font=(宋体, 16), relief=flat, background=#FFDEAD, command=lambda: append_num(1))
button_one.grid(padx=4, row=4, column=0)
button_two = tk.Button(root, text=2, width=5, font=(宋体, 16), relief=flat, background=#FFDEAD, command=lambda: append_num(2))
button_two.grid(padx=4, row=4, column=1)
button_three = tk.Button(root, text=3, width=5, font=(宋体, 16), relief=flat, background=#FFDEAD, command=lambda: append_num(3))
button_three.grid(padx=4, row=4, column=2)
button_equal = tk.Button(root, text==, width=5, height=3, font=(宋体, 16), relief=flat, background=#C0C0C0, command=lambda: equal())
button_equal.grid(padx=4, row=4, rowspan=5, column=3)
button_zero = tk.Button(root, text=0, width=12, font=(宋体, 16), relief=flat, background=#FFDEAD, command=lambda: append_num(0))
button_zero.grid(padx=4, pady=4, row=5, column=0, columnspan=2)
button_decimal = tk.Button(root, text=., width=5, font=(宋体, 16), relief=flat, background=#FFDEAD, command=lambda: append_num(.))
button_decimal.grid(padx=4, row=5, column=2)
现在得出界面效果
功能
添加数字
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def append_num(i):
lists.append(i)
result_num.set(.join(lists))
选择运算符号
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def operator(i):
if len(lists) > 0:
if lists[-1] in [+, -, *, /]:
lists[-1] = i
else:
lists.append(i)
result_num.set(.join(lists))
清零
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def clear():
lists.clear()
result_num.set(0)
退格
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def back():
del lists[-1]
result_num.set(lists)
等号
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def equal():
a = .join(lists)
end_num = eval(a)
result_num.set(end_num)
lists.clear()
lists.append(str(end_num))
定义一个列表收集输入的内容
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lists = []
result_num = tk.StringVar()
result_num.set(0)
最后运行代码，效果如下图
先试试
运算得出结果
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