首页 > 代码库 > python -Tkinter 实现一个小计算器功能

python -Tkinter 实现一个小计算器功能

文章来源:http://www.cnblogs.com/Skyyj/p/6618739.html

本代码是基于python 2.7的

 

如果是对于python3.X  则需要将 tkinter 改为Tkinter    将tkMessagebox 改为messagebox即可

 

#-*- coding:utf-8 -*-
from tkinter import *
import tkMessageBox



def get_Tk():
    top = Tk()
    return top

#定义求总和函数
def sum_test(baseNum,growthRate,time):
    return baseNum * (1+growthRate)**(time)

#定义增长函数
def add_sum (baseNum,growthRate,time):
    return baseNum * (1+growthRate)**(time) - baseNum


#定义第N天增长数函数
def add_num (baseNum,growthRate,time):
    return baseNum *growthRate* (1+growthRate)**(time-1)

def show_result(top,re_sum,re_add,add_Num,times):
    #这里使用Toplevel(top) 是为了新开一个窗口 ,且显示计算结果,如果直接实例化一个窗口,则新窗口不显示结算结果。
    top_show = Toplevel(top)
    top_show.title("计算结果显示")
    top_show.geometry(300x240+810+420)

    addNum = Label(top_show, text=第%d天增长数: % times)
    addNum.pack()
    num_text = StringVar()
    add_Nums = Entry(top_show, textvariable=num_text,state=readonly)
    num_text.set(add_Num)
    add_Nums.pack()

    # 显示增长数
    add_Sums = Label(top_show, text=%d天增长总数: % times)
    add_Sums.pack()
    add_text = StringVar()
    adds = Entry(top_show, textvariable=add_text,state=readonly)
    add_text.set(re_add)
    adds.pack()
    # 显示总数
    Sums = Label(top_show, text=%d天后总数: % times)
    Sums.pack()
    sum_text = StringVar()
    sums = Entry(top_show, textvariable=sum_text,state=readonly)
    sum_text.set(re_sum)
    sums.pack()

    top_show.mainloop()

def on_click(top,base_text,growth_text,time_text):

    #获取输入信息
    if base_text.get().strip() == ‘‘:
        tkMessageBox.showinfo(title=基数, message=基数为空,请输入有效的数值!)
    else:
        base_Num = float(base_text.get())

    if growth_text.get().strip() == ‘‘:
        tkMessageBox.showinfo(title=增长率, message=增长率为空,请输入有效的数值!)
    else:
        growth_Rate = float(growth_text.get())

    if time_text.get().strip() == ‘‘:
        tkMessageBox.showinfo(title=时间, message=时间为空,请输入有效的数值!)
    elif float(time_text.get()) < 1:
        tkMessageBox.showinfo(title=时间, message=时间小于1,请输入大于或等于1的数值!)
    else:
        temp_time = float(time_text.get())
        times = int(temp_time)

    re_sum = sum_test(base_Num, growth_Rate, times)
    # 四舍五入保留小数点后两位
    re_sum = round(re_sum, 2)
    # print type(re_sum)
    re_add = add_sum(base_Num, growth_Rate, times)
    # 四舍五入保留小数点后两位
    re_add = round(re_add, 2)

    add_Num = add_num(base_Num, growth_Rate, times)
    add_Num = round(add_Num, 2)

    show_result(top,re_sum,re_add,add_Num,times)

def put_info():
    top = get_Tk()
    #top.minsize(100, 100)  # 窗口的最小缩放
    top.title("计算总数量")
    top.geometry(300x240+420+420)


    baseNum = Label(top, text=基数:)
    baseNum.pack()
    base_text = StringVar()
    base = Entry(top, textvariable=base_text)
    base_text.set(" ")
    base.pack()

    growthRate = Label(top, text=增长率:)
    growthRate.pack()
    growth_text = StringVar()
    growth = Entry(top, textvariable=growth_text)
    growth_text.set(0.0115)
    growth.pack()

    useTime = Label(top, text=时间(天):)
    useTime.pack()
    time_text = StringVar()
    times = Entry(top, textvariable=time_text)
    time_text.set(" ")
    times.pack()

    Button(top, text="计算", command= lambda:on_click(top,base_text,growth_text,time_text)).pack()
    top.mainloop()

   # 这种 直接command = 方法名的方式,函数是不能传递参数的,所以为了能传递参数使用了上面的方法。
   # Button(top, text="计算", command= on_click).pack()

if __name__ == __main__:
    put_info()

 

文章来源:http://www.cnblogs.com/Skyyj/p/6618739.html

 

python -Tkinter 实现一个小计算器功能