Develop Reference

Values not stored in Tkinter Variables

In my code, I have tried to get the user input through text fields, store them in variables and finally print them in a tabular form.
The problem I am facing is that none of the values I enter through the text fields get displayed; when I try printing the variables, they come up empty.
Here's part of my code:
# SPASC
from tkinter import *
import tkinter as tk
import tkinter.ttk as tktrv
root = tk.Tk()
root.title("SPASC")
root.geometry("410x400")
lb1 = Label(root, text="SPASC \n Welcomes You !!!", fg="red", bg="sky blue"
, font=('Arial Black', 20), width=22, anchor=CENTER)
lb2 = Label(root, text="What would you like to compare?",
font=('Arial', 18), anchor=CENTER)
space1 = Label(root, text="\n\n")
lb1.grid(row=0)
lb2.grid(row=5)
space1.grid(row=1)
hpw, mil = StringVar(), StringVar()
def bt_cars():
w1 = Toplevel()
w1.title("Choose Features")
w1.geometry("430x200")
lb3 = Label(w1, text="Choose features for comparison", bg="yellow"
, font=('Arial Black', 18), width=25)
lb4 = Label(w1, text=" ", anchor=CENTER)
fr1 = LabelFrame(w1, width=20, padx=100)
hpw_cb = Checkbutton(fr1, text="Horsepower", variable=hpw, anchor='w', onvalue="Horsepower", offvalue="")
hpw_cb.grid()
hpw_cb.deselect()
mil_cb = Checkbutton(fr1, text="Mileage", variable=mil, anchor='w', onvalue="Mileage", offvalue="")
mil_cb.grid()
mil_cb.deselect()
var_stor = [hpw, mil]
print(hpw)
print(mil)
var_fill = []
for itr1 in var_stor:
if itr1 != "":
var_fill.append(itr1)
print(var_fill)
def car_1():
name1 = StringVar()
c1 = Toplevel()
c1.title("Car 1")
c1.geometry("430x200")
car1_lb1 = Label(c1, text="Car Name:")
name1_ifl = Entry(c1)
name1 = name1_ifl.get()
elm_var_fill = len(var_fill)
ct1 = 0
car1_val = []
for itr2 in var_fill:
if ct1 == elm_var_fill:
break
lb5 = Label(c1, text=itr2.get())
#Creating text field
ftr1_ifl = Entry(c1)
car1_ftr = ftr1_ifl.get()
car1_val.append(car1_ftr)
car1_ftr = None
lb5.grid(row=ct1 + 2, column=1)
ftr1_ifl.grid(row=ct1 + 2, column=2)
ct1 += 1
print(car1_val)
def display():
dp = Toplevel()
dp.title("Results")
dp.geometry("500x200")
car1_pt = 0
car2_pt = 0
car_tree = tktrv.Treeview(dp)
car_tree["columns"] = ("car1col")
car_tree.column("#0", width=120, minwidth=30)
car_tree.column("car1col", width=120, minwidth=30)
car_tree.heading("#0", text="Features" )
car_tree.heading("car1col", text=str(name1))
car_tree.pack()
c1.withdraw()
print(var_fill)
done1_bt = Button(c1, text="Continue", command=display)
name1_ifl.grid(row=0, column=2)
car1_lb1.grid(row=0, column=1)
done1_bt.grid(row=5,column=1)
w1.withdraw()
done_bt = Button(w1, text="Done", command=car_1)
done_bt.grid(row=3, column=1)
lb3.grid(row=0, column=1)
lb4.grid(row=1, column=1)
fr1.grid(row=2, column=1)
root.withdraw()
bt1 = Button(root, text="CARS", width=5, font=('Calibri', 15), command=bt_cars)
bt1.grid(row=7)
space2 = Label(root, text="\n\n")
space2.grid(row=6)
root.mainloop()
I am facing trouble with the variables named: hpw, mil, name1.
Any help would be welcome.
NOTE:- Please excuse the amount of code; I wanted others to replicate the error and see it for themselves

For the variables hpw and mil, these variables are empty strings that's why you are not getting any value from those checkboxes. To get values from the checkboxes replace these lines of code:
var_stor = [hpw, mil]
with
var_stor = [hpw_cb.cget('onvalue'), mil_cb.cget('onvalue')]
since you want the onvalue then you must use cget() method to access those values.
also, replace
lb5 = Label(c1, text=itr2.get())
with
lb5 = Label(c1, text=itr2)
because now you have required values (not objects) in a list, so just need to access those values.
For the variable name1 you can use #BokiX's method.

The problem is you are using get() wrong. You cannot use get() right after Entry() because as soon as entry is created it's getting the input before the user can even input something.
Use this code:
def get_input(text):
print(text)
e = Entry(root)
e.pack()
b = Button(root, text="Print input", command=lambda: get_input(e.get()))
b.pack()
Now get() method will not be executed before you click the button.

Problems with tkinter grid layout in python

I'm doing the Angela Yu 100 days of code python course and im having trouble with the grid layout in tkinter package. I don't understand why my Entry objects aren't directly under each other. I used the same padding and size values as in the course and i tried to change them to look better but the password entry and the add button are more on the left then other entries while they have the same column number in the grid function. Thank u for ur help ^^
Here is the code i used for interface:
window = Tk()
window.title("Password Manager")
window.config(padx=50, pady=50)
logo = PhotoImage(file="logo.png")
image = Canvas(width=200, height=200, highlightthicknes=0)
image.create_image(100, 100, image=logo)
image.grid(column=1, row=0)
website = Label(text="Website:")
website.grid(column=0, row=1)
email = Label(text="Email/Username:")
email.grid(column=0, row=2)
password = Label(text="Password:")
password.grid(column=0, row=3)
website_blank = Entry(width=36)
website_blank.grid(column=1, row=1, columnspan=2)
website_blank.focus()
email_blank = Entry(width=36)
email_blank.grid(column=1, row=2, columnspan=2)
email_blank.insert(0, "aleksander.jaloszynski#gmail.com")
password_blank = Entry(width=21)
password_blank.grid(column=1, row=3)
generate_password = Button(text="Generate Password")
generate_password.grid(column=2, row=3)
add = Button(text="Add", width=36, command=save)
add.grid(column=1, row=4, columnspan=2)
window.mainloop()
And here is how it looks:
enter image description here

Solving problem to generate custom number from inserted values with GUI in Python

Hello im having python learning project. I want to insert in GUI two numbers, which are defining range for program to generate random number from.
I am really having problems with calling function with press of the button. And constantly getting error ValueError: invalid literal for int() with base 10: '', when trying to convert string from entry in GUI to int and then inserting them into random.randint.
Thx for Help!
from tkinter import *
import random
root = Tk()
root.title("Generator custom random number")
#function that gets number from entry converts string to int and defines target number in stevilo
def function():
string_answer1 = prvo_stevilo.get()
int1 = int(string_answer1)
string_answer2 = drugo_stevilo.get()
int2 = int(string_answer2)
stevilo = random.randint(int1, int2)
#Defining GUI
navodilo = Label(root, text="Choose custom lower and upper number to chose random number from", width=60)
navodilo2 = Label(root, text="From", width=20, borderwidth=3)
navodilo3 = Label(root, text="To", width=20, borderwidth=3)
prvo_stevilo = Entry(root, width=20, borderwidth=3)
drugo_stevilo = Entry(root, width=20, borderwidth=3)
gumb = Button(root, text="Generate number", width=17, height=2, command=function)
praznavrstica = Label(root, text="")
izpis = Label(root, text="Random number is: ", width=20)
izpis_stevila = Label(root, text="" + stevilo)
#Showcase of gui
navodilo.grid(row=0, column=0, columnspan=1)
navodilo2.grid(row=1, column=0, columnspan=1)
navodilo3.grid(row=3, column=0, columnspan=1)
prvo_stevilo.grid(row=2, column=0, columnspan=1)
drugo_stevilo.grid(row=4, column=0, columnspan=1)
praznavrstica.grid(row=5, column=0, columnspan=1)
gumb.grid(row=6, column=0, columnspan=1)
praznavrstica.grid(row=7, column=0, columnspan=1)
izpis.grid(row=8, column=0, columnspan=1)
izpis_stevila.grid(row=9, column=0, columnspan=1)
#Loop
root.mainloop()

I've noticed few problems with your code. I was able to make it running without too many changes, although probably it is not the best way.
First answer to your question: you are getting this error, because you are trying to change string -> '' to int. It happens because function() is running before you click button.
Another problem:
izpis_stevila = Label(root, text="" + stevilo)
variable 'stevilo' simply doesn't exist before calling function(), so delete it from here.
My proposition for changes:
1)
gumb = Button(root, text="Generate number", width=17, height=2,command = lambda: function())
Without lambda your function will run no matter of state of your button.
2)
first = IntVar(root, value=0)
second = IntVar(root, value=1)
prvo_stevilo = Entry(root, width=20, borderwidth=3, textvariable=first)
drugo_stevilo = Entry(root, width=20, borderwidth=3, textvariable=second)
If you run function without any values in your entry you will get error. This change allows you to put default value for your entry widgets.
3)
def function():
if prvo_stevilo.get() == '' or drugo_stevilo.get() =='':
return
else:
string_answer1 = prvo_stevilo.get()
int1 = int(string_answer1)
string_answer2 = drugo_stevilo.get()
int2 = int(string_answer2)
stevilo = random.randint(int1, int2)
izpis_stevila = Label(root, text=str(stevilo))
izpis_stevila.grid(row=9, column=0)
Firstly check if your entry is not empty.
Secondly update label, also remeber about changing int to string here text=str(stevilo).

Why isn't my label being displayed in tkinter?

def name_label_manager(event):
name = name_entry.get()
label_name = Label(root, text="Name: " + name)
label_name.grid(row=10, column=1, sticky=W)
label_name.delete(0, "end")
def description_label_manager(event):
description1 = description.get()
descrpt = Label(root, text="Description: " + description1)
descrpt.grid(row=9, column=1, sticky=W)
descrpt.delete(0, "end")
i am calling them like this:
button_get = Button(root, text="Submit")
button_get.bind("<Button-1>", description_label_manager,name_label_manager)
button_get.grid(row=2, column=8)
i dont know if this i right but i am calling them with button
for some reason the desctription_label_manager label will show, but the name label wont

As Bryan Oakley pointed out, labels do not have a delete method, Entry Listbox do, but not labels
More so, you can think of tkinter widgets as images drawn on your screen, for these images to display text they must have variables associated with them, here we create some StringVar() variables and assign them to the Entry which you can then use the get method to get what is currently stored in them.
You can add a command argument to a Button to call a function, that should do in this your case.
Check out the code below to understand what I just explained above
import tkinter as tk
def name_label_manager(event=None):
name = name_entry_variable.get()
label_name = tk.Label(root, text="Name: "+name)
label_name.grid(row=10, column=1)
#label_name.delete(0, "end")
description_label_manager()
def description_label_manager(event=None):
description1 = description_entry_variable.get()
descrpt = tk.Label(root, text="Description: "+description1)
descrpt.grid(row=9, column=1)
#descrpt.delete(0, "end")
root=tk.Tk()
name_entry_variable=tk.StringVar()
description_entry_variable=tk.StringVar()
name_entry=tk.Entry(root,textvariable=name_entry_variable,width=10)
name_entry.grid(row=2, column=8)
description_entry=tk.Entry(root,textvariable=description_entry_variable,width=10)
description_entry.grid(row=3, column=8)
button_get = tk.Button(root, text="Submit", command=name_label_manager)
#button_get.bind("<Button-1>", description_label_manager,name_label_manager) command argument of Button should do
button_get.grid(row=4, column=8)
root.mainloop()

How to get the value of the selected radio button?

I would like to create 2 different groups of radio buttons. The user would select one option from either group. There would be a function that would get the values(strings) from the selected radio buttons and then print them. Here's my code but it doesn't work (i'm new to python).
from tkinter import *
root = Tk()
btn1 = "lol"
btn2 = "lel"
def funkcija():
n = entry1.get()
m = "null"
X = btn1.get()
Y = btn2.get()
print("%s %s je %s %s." % (n, X, m, Y))
theLabel = Label(root, text="Vnesite količino in izberite prvo valuto.")
theLabel.grid(row=0, columnspan=3)
gumb1=Radiobutton(root,text="Euro",value = "euro",variable = "btn1").grid(row=2, column=1, sticky=W)
gumb2=Radiobutton(root,text="Dolar",value = "dolar",variable = "btn1").grid(row=3, column=1, sticky=W)
gumb3=Radiobutton(root,text="Funt",value = "funt",variable = "btn1").grid(row=4, column=1, sticky=W)
label3= Label(root, text="Izberite drugo valuto.")
label3.grid(row=6, columnspan=3)
label35= Label(root)
label35.grid(row=5, columnspan=3)
gumb4=Radiobutton(root,text="Euro",value = "euro",variable = "btn2").grid(row=7, column=1, sticky=W)
gumb5=Radiobutton(root,text="Dolar",value = "dolar",variable = "btn2").grid(row=8, column=1, sticky=W)
gumb6=Radiobutton(root,text="Funt",value = "funt",variable = "btn2").grid(row=9, column=1, sticky=W)
label1 = Label(root, text="Količina:")
label1.grid(row=1, sticky=E)
entry1 = Entry(root)
entry1.grid(row=1, column=1, sticky=W)
go = Button(root, text="Izračun", fg="white", bg="black", command=funkcija)
go.grid(row=10, columnspan=3)
root.mainloop()

In your radio button, analyze the parameters that you are passing:
gumb1 = Radiobutton(root,
text = "Euro",
value = "Euro",
variable = "btn2"
The parameters value and variable are what stores the data of the radio button. You've set your value option correctly. The interpreter will automatically set the variable with the value when the radio button is selected.
But here's where your issue is:
variable = "btn2"
"btn2" is a string. Not very useful though, is it? In fact, you're trying to perform methods on it that don't even exist. Such as here:
def funkcija():
X = btn2.get()
In fact, taking this information, you almost got there!
At the top of your script, you need to set btn2 to Tkinter's StringVar, like so:
from tkinter import *
btn1 = StringVar()
btn2 = StringVar()
Now that's done, let's change our parameters in our radio buttons.
gumb1 = Radiobutton(root,
text = "Euro",
value = "Euro",
variable = btn2
Now, Tkinter will automatically update the variable when it is selected. To get the value, do the same that you had done in your funkcija.
X = btn2.get()
And then the value of btn2 (which was updated by the radio buttons) will not be read, and stored into the variable X.