How can I automatically read the value of Tkinter Entry?

user_12790502 0
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Good day,

I'm currently developing a simple Tkinter project. I have an RFID Reader that automatically prints/pastes its ID# once scanned. I have created this simple Tkinter window wherein the ID# is pasted on the Entry. My problem is that the messagebox does not appear even after the ID# is already pasted on the Entry field.

from tkinter import *
from tkinter import messagebox

root = Tk()
root.title("RFID Reader")
root.geometry("400x250")

rfid_label = Label(root, text="RFID Reader", font=("arial", 15, 'bold'), fg='red')
rfid_label.place(x=100, y=50)

rfid_entry = Entry(root, font=('arial', 15, 'bold'))
rfid_entry.focus()
rfid_entry.place(x=100, y=100)

scanned_ID = rfid_entry.get()
if len(scanned_ID) > 1:
    messagebox.showinfo(title="RFID Reader", message="RFID Scan Successful.")


root.mainloop()

Please help! Thanks!

tkinter python
1 Answers

It requires a mainloop

from tkinter import *
from tkinter import messagebox

root = Tk()
root.title("RFID Reader")
root.geometry("400x250")
def read():
    scanned_ID = rfid_entry.get()
    if len(scanned_ID) > 1:
        messagebox.showinfo(title="RFID Reader", message="RFID Scan Successful.")
rfid_label = Label(root, text="RFID Reader", font=("arial", 15, 'bold'), fg='red')
rfid_label.place(x=100, y=50)

rfid_entry = Entry(root, font=('arial', 15, 'bold'))
rfid_entry.focus()
rfid_entry.place(x=100, y=100)
B=Button(root,text="Enter",command=read)
B.pack()
root.mainloop()

Please check this solution and tell me whether this helped you

user_138924870
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