TkInter Binding Buttons

[ifigazsi]

pressed_enter is a function. You can bind a function. pressed_enter() calls the function and is the function's return value (None). You cannot bind None.

Thanks, now it works!

One more:

Is it possible that tk.Button and Key binding use the same function?

import tkinter as tk

root = tk.Tk()
root.geometry('250x100')

############# FUNCTIONS ###########x

def check_in_database_with_btn(data, chk):
    if data in chk:
        print(f'{data} was found in database.')
    else:
        print(f'{data} no match in database.')

def check_in_database_with_key(event, data, chk):
    check_in_database_with_btn(data, chk)

########### DATABASE ##################

chk_database = ['Eric', 'John', 'Graham', 'Terry']


############ ENTRY & BUTTON & BIND ######################

field_entry = tk.Entry(root, width=20)
field_entry.grid(row=0, column=0)

chk_in_database_btn = tk.Button(root, text='Check database',
                                command=lambda: check_in_database_with_btn(field_entry.get(), chk_database))
chk_in_database_btn.grid(row=0, column=1)

field_entry.bind("<Return>", lambda event: check_in_database_with_key(event, field_entry.get(), chk_database))

root.mainloop()