本文實例介紹了基于python的Tkinter實現簡易計算器的詳細代碼,分享給大家供大家參考,具體內容如下
第一種:使用python 的 Tkinter實現一個簡易計算器
#coding:utf-8from Tkinter import *import timeroot = Tk()def cacl(input_str):if "x" in input_str:ret = input_str.split("x")return int(ret[0]) * int(ret[1])def callback(n):print ndef callback1(n):print nclass App:def __init__(self, master):frame1 = Frame(master)frame1.pack()frame = Frame(master)frame.pack()Button(frame, text="1",command=lambda: callback(1) ).grid(row=0,column=0)Button(frame, text="2",command=lambda: callback(2) ).grid(row=0,column=1)Button(frame, text="3",command=lambda: callback(3) ).grid(row=0,column=2)Button(frame, text="4",command=lambda: callback(4) ).grid(row=1,column=0)Button(frame, text="5",command=lambda: callback(5) ).grid(row=1,column=1)Button(frame, text="6",command=lambda: callback(6) ).grid(row=1,column=2)Button(frame, text="7",command=lambda: callback(7) ).grid(row=2,column=0)Button(frame, text="8",command=lambda: callback(8) ).grid(row=2,column=1)Button(frame, text="9",command=lambda: callback(9) ).grid(row=2,column=2)Button(frame, text="0",command=lambda: callback(0) ).grid(row=3,column=0)Button(frame, text="+",command=lambda: callback1("+") ).grid(row=3,column=1)Button(frame, text="-",command=lambda: callback1("-") ).grid(row=3,column=2)Button(frame, text="*",command=lambda: callback1("*") ).grid(row=4,column=1)Button(frame, text="/",command=lambda: callback1("/") ).grid(row=4,column=2)Button(frame, text="=", command=self.say_hi).grid(row=4,column=0)w = Label(frame1,text="輸入結果")w.pack()self.e = Entry(frame1)self.e.pack(padx=5)w1 = Label(frame1,text="計算結果")w1.pack()v = StringVar()e1 = Entry(frame1, textvariable=v)v.set("")self.v = ve1.pack()def say_hi(self):print "hi there, everyone!",self.e.get()input_str = self.e.get()self.v.set(cacl(input_str))app = App(root)root.mainloop()
第二種:基于Tkinter用50行Python代碼實現簡易計算器
Tkinter一般是python自帶的,所以代碼不需要其他組件,本程序是在python2.7版本實現的。
主要涉及了tkinter的使用,函數定義和調用,匿名函數的使用,類成員函數定義等python基礎知識,適合新手學習。
代碼如下:
from Tkinter import * #創建橫條型框架 def frame(root, side): w = Frame(root) w.pack(side = side, expand = YES, fill = BOTH) return w #創建按鈕 def button(root, side, text, command = None): w = Button(root, text = text, command = command) w.pack(side = side, expand = YES, fill = BOTH) return w #繼承了Frame類,初始化程序界面的布局 class Calculator(Frame): def __init__(self): Frame.__init__(self) self.pack(expand = YES, fill = BOTH) self.master.title('Simple Calculater') display = StringVar() #添加輸入框 Entry(self, relief = SUNKEN, textvariable = display).pack(side = TOP, expand = YES, fill = BOTH) #添加橫條型框架以及里面的按鈕 for key in('123', '456', '789', '-0.'): keyF = frame(self, TOP) for char in key: button(keyF, LEFT, char, lambda w = display, c = char:w.set(w.get() + c)) #添加操作符按鈕 opsF = frame(self, TOP) for char in '+-*/=': if char == '=': btn = button(opsF, LEFT, char) btn.bind('<ButtonRelease - 1>', lambda e, s = self, w = display:s.calc(w), '+') else: btn = button(opsF, LEFT, char, lambda w = display, s = '%s' %char:w.set(w.get() + s)) #添加清除按鈕 clearF = frame(self, BOTTOM) button(clearF, LEFT, 'clear', lambda w = display:w.set('')) #調用eval函數計算表達式的值 def calc(self, display): try: display.set(eval(display.get())) except: display.set("ERROR") #程序的入口 if __name__ == '__main__': print('ok') Calculator().mainloop()
實現效果如下圖:
以上就是本文的全部內容,希望對大家的學習Python程序設計有所幫助。