我是一名新手程序员,正在制作货币转换器...。它仍在进行中,但是谁能帮助我替换在'def convert()'中制作的标签...要清楚一点,现在每次转换时,下面都会弹出一个新标签,但是我想发生的是,每次单击转换时,我的标签都会被替换...
import sys
from Tkinter import *
root = Tk()
root.title("CURRENCY CONVERTER")
root.geometry('600x300+30+100')
root.config(bg="#000000")
#*************************************GBP*************************************#
def rate():
rate = 1
if var.get() =='GBP' and var2.get() =='USD':
rate=float(1.63452)
if var.get() =='GBP' and var2.get() =='EUR':
rate=float(1.19529)
if var.get() =='GBP' and var2.get() =='INR':
rate=float(99.9639)
if var.get() =='GBP' and var2.get() =='AUD':
rate=float(1.79578)
if var.get() =='GBP' and var2.get() =='CAD':
rate=float(16.8796)
if var.get() =='GBP' and var2.get() =='NZD':
rate=float(1.97334)
if var.get() =='GBP' and var2.get() =='JPY':
rate=float(168.143)
if var.get() =='GBP' and var2.get() =='CNY':
rate=float(9.93698)
#*************************************USD*************************************#
if var.get() =='USD' and var2.get() =='GBP':
rate=float()
##to do ....ADD MORE
return rate
#----------------------------------HELP------------------------------#
def convert():
converted=Label(root, text=(var.get(), int(entarr.get()),">>>", round((float(entarr.get())*rate()),3), var2.get()))
converted.config(font=('century gothic',(15)),bg='#000000',fg="white",width=0, relief=FLAT)
converted.pack(expand = 1,anchor="center")
return
#--------------------------------HELP--------------------------------#
#title
Title=Label(root, text="Currency Converter", cursor="heart")
Title.config(font=('century gothic',(35)),bg='#fff60b', fg="#9c0200",width=0,relief=RAISED)
Title.pack(expand=1, anchor=CENTER)
#entry box
entarr = DoubleVar()
entarr.set(0)
entry = Entry(root, textvariable=entarr, cursor="plus")
entry.config(font=('century gothic',(15)),bg='#ff6100',width=0, relief=SOLID)
entry.pack(expand = 1, anchor="center")
#currency 1
var = StringVar(root)
var.set('Choose a currency to convert from')
choices = ['GBP', 'USD', 'EUR','INR','AUD','CAD','NZD','JPY','CNY']
option = OptionMenu(root, var, *choices)
option.config(font=('century gothic',(15)),bg='#fff60b',fg="#9c0200",activebackground='#00ff80',width=0, cursor="", relief=FLAT)
option.pack(ipadx=10,ipady=0, expand=1,anchor="center")
#convert button
Arrow= Button(root, text=">>>>CONVERT>>>>", command = convert, cursor="exchange")
Arrow.config(font=('century gothic',(15)),width=0, bg="#ff6100", relief=SOLID)
Arrow.pack(ipadx=1,ipady=0, expand =1, anchor="center")
#currency 2
var2 = StringVar(root)
var2.set('Choose a currency to convert to')
choices2 = ['GBP', 'USD', 'EUR','INR','AUD','CAD','NZD','JPY','CNY']
option2 = OptionMenu(root, var2, *choices2)
option2.config(font=('century gothic',(15)),bg='#fff60b',fg="#9c0200",activebackground='#00ff80',width=0, relief=FLAT)
option2.pack(ipadx=10,ipady=0, expand=1,anchor="center")
root.mainloop()
编辑:
很困惑,请帮助我。我不知道,超级菜鸟在这里!
def convert():
newValue=(var.get(), int(entarr.get()),">>>", round((float(entarr.get())*rate()),3), var2.get())
converted=Label(root, textvariable=newValue)
converted.config(font=('century gothic',(15)),bg='#000000',fg="white",width=0, relief=FLAT)
converted.config(text=newValue)
converted.pack(expand = 1,anchor="center")
return
有两种简单的方法可以完成此操作。在这两种情况下,都涉及一次创建标签,然后动态更改显示的文本。
方法1 ..使用文字变数
如果将aStringVar
与标签关联,则每当更改StringVar的值时,标签就会自动更新:
labelVar = StringVar()
label = Label(..., textvariable=labelVar)
...
# label is automatically updated by this statement:
labelVar.set(newValue)
方法2:使用以下configure
方法更新文本:
label = Label(...)
...
# update the label with the configure method:
label.configure(text=newValue)
在这两种情况下,您都需要确保要更改的对象(小部件或StringVar)是全局变量或实例变量,以便以后可以在代码中访问它。
本文收集自互联网,转载请注明来源。
如有侵权,请联系[email protected] 删除。
我来说两句