Attached variables : TextField Entry « GUI Tk « Python

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Python » GUI Tk » TextField EntryScreenshots 
Attached variables
 

#!/usr/bin/env python
from Tkinter import *
import math

root = Tk()              
top = Frame(root)        
top.pack(side='top')     

hwtext = Label(top, text='Hello, World! The sine of')
hwtext.pack(side='left')

r = StringVar() 
r.set('1.2')    
r_entry = Entry(top, width=6, textvariable=r)
r_entry.pack(side='left')

s = StringVar() # variable to be attached to s_label
def comp_s():
    global s
    s.set('%g' % math.sin(float(r.get()))) # construct string

compute = Button(top, text=' equals ', command=comp_s)
compute.pack(side='left')

s_label = Label(top, textvariable=s, width=18)
s_label.pack(side='left')

root.mainloop()

   
  
Related examples in the same category
1. Entry (Text field) with a label inside a border panelEntry (Text field) with a label inside a border panel
2. Use EntryUse Entry
3. Entry: TextField: get entered valueEntry: TextField: get entered value
4. Entry: enter eventEntry: enter event
5. Use Entry widgets directly and layout by rowsUse Entry widgets directly and layout by rows
6. Entry Fields in a rowEntry Fields in a row
7. Get value from EntryGet value from Entry
8. Set textvariable for Entry
9. Bind enter key to Entry
10. implement a very simple calculator, just evaluating Python math
11. Entry Field in a model dialogEntry Field in a model dialog
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