How create and assign tkinter variable for every items in a list

Question

I am trying to create a program that allows user to select from a list of symptoms they have and find the disease.i added a drop-down menu that contains the symptoms in checkboxes

clicked2=StringVar(root) 
clicked2.set(symptoms[0]) 
  
drop2=OptionsMenu(root,variable=clicked2,value="options :")
drop2.pack()
checked=[] #contain the checked symptoms

def checkedSymptom:
    if (var2.get()=1):
        checked.append(symptom)
        print(symptom)
    elif (var2.get()=0):
        pass

this is the part I'm having an issue with

for symptom in symptoms:
    var2=IntVar()
    drop2['menu'].add_checkbutton(label=symptom,onvalue=1,offvalue=0, variable=var2, command=checkedSymptom)

symptoms here is the list of symptoms

but since it loops through the list of symptoms each time it loops the variable that holds the checkbox is overwritten. so at the end only the last item on the list does anything when checked.

-

Use a dictionary to store those IntVar.

acw1668
– acw1668

2020-08-10 00:42:34 +00:00
Commented Aug 10, 2020 at 0:42 — acw1668
– acw1668, Commented Aug 10, 2020 at 0:42

acw1668 · Accepted Answer · 2020-08-10 01:54:36Z

1

You can use a dictionary to store the variables:

vars = {}
for symptom in symptoms:
    var2 = IntVar(root)
    drop2['menu'].add_checkbutton(label=symptom, onvalue=1, offvalue=0, variable=var2, command=checkedSymptom)
    vars[symptom] = var2

Then use the dictionary inside checkedSymptom() to check which symptom is checked:

def checkedSymptom():
    checked.clear()
    checked.extend([key for key in vars if vars[key].get() == 1])
    print(checked)

answered Aug 10, 2020 at 1:54

acw1668

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1 Comment

Casper Josiah Over a year ago

It took me a while to understand it but thanks it solved my problem

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