Based on your example code, nowhere do you set NumA
, NumB
, or NumC
to a value, and those variables aren't associated with any widgets. Plus, you create variables named NumA
, NumB
and NumC
, but in your function you're using Num_A
, Num_B
and Num_C
.
Exponential function in a Tkinter gui
-
04-04-2022 - |
题
I am having a problem trying to define a exponential function in a Tkinter gui. My Gui is composed by three combo boxes where I can choose different numbers. When I select all numbers it displays a result based on a exponential function. What I mean is as follows:
- Select NumberA #Combobox 1
- Select NumberB #Combobox 2
Select NumberC #Combobox 3
Result = exp[(-NumberA/NumberB)* NumberC]
What I have so far is as follows, but it doesn't work:
#Main Selection
def exponential(*args):
try:
product.set('%g' %math.exp((float(Num_A.get())/float(Num_B.get())*float(Num_C.get()),2)))
except ValueError:
pass
## variables
NumA = StringVar()
NumB = StringVar()
NumC = StringVar()
product= DoubleVar()
#Combo boxes,
#NumA NumB and NumC are similar
ttk.Label(stepTen, text="Select A):").grid(column =3, row = 0)
NumA_Select = Combobox(stepTen, values=("0.1", "0.2", "0.3","0.4",),textvariable=Num_OneT)
NumA_Select.grid(column=4, row=0, columnspan="5", sticky="nswe")
NumA.trace("w",exponential)
## display results
ttk.Label(stepTen, text = "Exponential Dist result:").grid(column = 3, row = 12)
ttk.Label(stepTen, textvariable=product).grid(column = 4, row = 12)
#End Code
root.mainloop()
Thank you very much in advance!
解决方案
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