Update label text after pressing a button in Tkinter

Answer for "how to do anything on pressing button" should be in any tutorial.
For example in effbot book: Button

Use command= to assign function name to button.

(btw: function name (or callback) means name without parenthesis and arguments)

btn = Button(root, text="OK", command=onclick)

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Answer for "how to change label text" should be in any tutorial too.

lbl = Label(root, text="Old text")

# change text

lbl.config(text="New text")

# or

lbl["text"] = "New text"

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If you want to change Entry into Label then remove/hide Entry (widget.pack_forget()) or destroy it (widget.destroy()) and create Label.

btw: you can disable Entry instead of making Label (ent.config(state='disabled'))

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EDIT: I removed dot in lbl.["text"]

write lbl.pack() after you write the button.pack() A small snippet of code to display change in value on clicking a button. This is done so that the changes made in the label will be shown after you perform the button click.

    from tkinter import *

    root = Tk(className = "button_click_label")
    root.geometry("200x200")

    message = StringVar()
    message.set('hi')

    l1 = Label(root, text="hi")


    def press():
        l1.config(text="hello")

    b1 = Button(root, text = "clickhere", command = press).pack()

    l1.pack()

    root.mainloop()

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Im just an entry level python programmer. Forgive , and do correct me if I'm wrong! Cheers!