python学习记录五——制作一个非常简单的计算器

好吧，最近学python经常和C语言弄混，习惯太不一样了

#coding:utf-8 
import tkinter #引入界面设计库
import sys #引入系统交互操作
import  os #方便路径访问
import re  #引入正则化

#利用此函数实现资源路径的定位
def get_resources_path(relative_path):
    if getattr (sys, "frozen", False):
        base_path = sys._MEIPASS #获取临时资源
    else:
        base_path = os.path.abspath(".") #获取当前路径
    return os.path.join(base_path, relative_path) #获取绝对路径

LOGO_PATH  = get_resources_path(os.path.join("resources" ,"cc1.ico"))
IMAGE_PATH = get_resources_path(os.path.join("resources" ,"cc2.png")) 

class MainForm:
    def __init__(self):
        self. root = tkinter.Tk()  #新建一个窗体
        self.root.title ( "好用的计算器") #标题
        self.root.geometry("231x280")  #初始窗口大小，为小写x
        self.root.maxsize (1000,1000) #最大化后窗口大小
        self.root.iconbitmap(LOGO_PATH) #图标，bmp格式可直接修改后缀
        self.root["background"] = "LightPink" #界面颜色设置，其他颜色可以百度 

        self.input_frame()#显示输入组
        self.button_frame() #显示按钮组

        self.root.mainloop() #显示整个界面

    #定义输入组件
    def input_frame(self): 
        self.input_frame = tkinter.Frame(self.root, width = 20) #创建一个内部容器
        self.content = tkinter.StringVar() #标签的显示
        #单行输入使用entry组件
        self.entry = tkinter.Entry(self.input_frame, 
        width = 14, 
        font = ("微软雅黑", 20), 
        textvariable = self.content) 
        
        #entry组件显示
        self.entry.pack(fill = "x",expand ="1")
        self.clean = False
        self.input_frame.pack (side = "top")

    def button_frame(self):
        #创建一个button组
        self.button_frame = tkinter.Frame(self.root, width = 50)
        #申明一个列表存button组件
        self.button_list = [[],[],[],[]]
        self.button_list[0].append(tkinter.Button( self.button_frame,text = "1", fg = "black", width =3, font = ("微软雅黑",20)))
        self.button_list[0].append(tkinter.Button( self.button_frame,text = "2", fg = "black", width =3, font = ("微软雅黑",20)))
        self.button_list[0].append(tkinter.Button( self.button_frame,text = "3", fg = "black", width =3, font = ("微软雅黑",20)))
        self.button_list[0].append(tkinter.Button( self.button_frame,text = "+", fg = "black", width =3, font = ("微软雅黑",20)))

        self.button_list[1].append(tkinter.Button( self.button_frame,text = "4", fg = "black", width =3, font = ("微软雅黑",20)))
        self.button_list[1].append(tkinter.Button( self.button_frame,text = "5", fg = "black", width =3, font = ("微软雅黑",20)))
        self.button_list[1].append(tkinter.Button( self.button_frame,text = "6", fg = "black", width =3, font = ("微软雅黑",20)))
        self.button_list[1].append(tkinter.Button( self.button_frame,text = "-", fg = "black", width =3, font = ("微软雅黑",20)))

        self.button_list[2].append(tkinter.Button( self.button_frame,text = "7", fg = "black", width =3, font = ("微软雅黑",20)))
        self.button_list[2].append(tkinter.Button( self.button_frame,text = "8", fg = "black", width =3, font = ("微软雅黑",20)))
        self.button_list[2].append(tkinter.Button( self.button_frame,text = "9", fg = "black", width =3, font = ("微软雅黑",20)))
        self.button_list[2].append(tkinter.Button( self.button_frame,text = "*", fg = "black", width =3, font = ("微软雅黑",20)))

        self.button_list[3].append(tkinter.Button( self.button_frame,text = "0", fg = "black", width =3, font = ("微软雅黑",20)))
        self.button_list[3].append(tkinter.Button( self.button_frame,text = ".", fg = "black", width =3, font = ("微软雅黑",20)))
        self.button_list[3].append(tkinter.Button( self.button_frame,text = "=", fg = "black", width =3, font = ("微软雅黑",20)))
        self.button_list[3].append(tkinter.Button( self.button_frame,text = "/", fg = "black", width =3, font = ("微软雅黑",20)))

        #规划button的位置
        self.row = 0
        for group in self.button_list:
            self.column = 0
            for button in group:
                button.bind ("<Button-1>", lambda event: self.button_handle(event)) #绑定事件
                button.grid(row = self.row, column = self.column) #放置每个按钮的位置
                self.column += 1
            self.row += 1
        self.button_frame.pack (side ="bottom") #放置整个frame

    def button_handle(self, event):
        #获取输入的字符
        oper = event.widget ["text"]
        #清除操作
        if self.clean :
            self.content.set("")
            self.clean = False
        #显示输入的字符
        if oper != "=":
            self.entry.insert ("end", oper)
        else:
            #计算表达式
            result =0
            exp = self.entry.get()
            pattern = r"\+|\-|\*|\/"
            nums = re.split(pattern, exp)
            flag = re.findall (pattern, exp)[0]

            if flag == "+":
                result = float(nums[0] )+ float(nums[1])

            if flag == "-":
                result = float(nums[0] )- float(nums[1])

            if flag == "*":
                result = float(nums[0]) * float(nums[1])

            if flag == "/":
                result = float(nums[0]) / float(nums[1])

            #显示计算结果
            self.entry.insert("end", "=%s" %result)

            self.clean = True
            


def main():
    MainForm()

if __name__ == "__main__":
    main()

太难了，我快要忘记C怎么写的了,啊啊啊啊啊啊，可不可以统一一下啊，我要精神分裂了

来源：CSDN

作者：吃不胖的粥

链接：https://blog.csdn.net/weixin_41485242/article/details/104718864