本文实例介绍了基于python的Tkinter实现简易计算器的详细代码,分享给大家供大家参考,具体内容如下
第一种:使用python 的 Tkinter实现一个简易计算器
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#coding:utf-8
from Tkinter import *
import time
root = 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 n
def callback1(n):
print n
class 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 = "输入结果" )
w.pack()
self .e = Entry(frame1)
self .e.pack(padx = 5 )
w1 = Label(frame1,text = "计算结果" )
w1.pack()
v = StringVar()
e1 = Entry(frame1, textvariable = v)
v. set ("")
self .v = v
e1.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()
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第二种:基于Tkinter用50行Python代码实现简易计算器
Tkinter一般是python自带的,所以代码不需要其他组件,本程序是在python2.7版本实现的。
主要涉及了tkinter的使用,函数定义和调用,匿名函数的使用,类成员函数定义等python基础知识,适合新手学习。
代码如下:
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from Tkinter import *
#创建横条型框架
def frame(root, side):
w = Frame(root)
w.pack(side = side, expand = YES, fill = BOTH)
return w
#创建按钮
def button(root, side, text, command = None ):
w = Button(root, text = text, command = command)
w.pack(side = side, expand = YES, fill = BOTH)
return w
#继承了Frame类,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()
#添加输入框
Entry( self , relief = SUNKEN,
textvariable = display).pack(side = TOP, expand = YES,
fill = BOTH)
#添加横条型框架以及里面的按钮
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))
#添加操作符按钮
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))
#添加清除按钮
clearF = frame( self , BOTTOM)
button(clearF, LEFT, 'clear' , lambda w = display:w. set (''))
#调用eval函数计算表达式的值
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()
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实现效果如下图:
以上就是本文的全部内容,希望对大家的学习Python程序设计有所帮助。