How if condition and clear the entry works in tkinter?

Question

def Input(PIn , BIn , AIn) :
    if (PIn ==0) and (BIn ==0) and (AIn == 0)  :
         print ("ok")

    else :
         str(PIn)
         int(BIn)
         int(AIn)
         global n
         proc.append([PIn , BIn , AIn ])
         n+=1
         PIn.delete(0,END)
         BIn.delete(0,END)
         AIn.delete(0,END)
         print(proc , n)

I am trying to convert my python CODE to GUI but I have two problems. The first one is the if-statement is not working so if the user has entered 0 for all variables it will go to the else. the second one is that I can not clear the entry.

Answer 1

If you want to edit/ get a value from the Entry widget of tkinter you need to use

tkinter.StringVar()

PIn_text_var = StringVar() 
PIn = Entry(root, textvariable=PIn_text_var)

#To edit the widget's text : 

PIn_text_var.set("new value") 

#To get the widgets text :

s = PIn_text_var.get()
print(s) 
# output : 'new value'

If you want to clear the Entry widget's text :

PIn_text_var.set("") 

So as for your example :

PIn_text_var = tkinter.StringVar() 
BIn_text_var = tkinter.StringVar() 
AIn_text_var = tkinter.StringVar()

proc = []
n = 0 

def Input () :
    global n

    P = PIn_text_var.get()
    B = BIn_text_var.get()
    A = AIn_text_var.get() 

    if (P=="0") and (B=="0") and (A=="0") : 
        print ("ok") 

    else : 
        temp_var_p = P
        temp_var_b = int(B)
        temp_var_a = int(A)

        proc.append([temp_var_p, temp_var_b, temp_var_a ]) 

        PIn_text_var.set("")
        BIn_text_var.set("")
        AIn_text_var.set("")
        n+=1
        print(proc , n)