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Which of the following is the correct way to update a label text every second in Tkinter?

easy📝 Syntax Q12 of 15
Raspberry Pi - Display and Output
Which of the following is the correct way to update a label text every second in Tkinter?
Alabel.refresh(1000, update_function)
Blabel.update(1000, update_function)
Clabel.after(1000, update_function)
Dlabel.repeat(1000, update_function)
Step-by-Step Solution
Solution:
  1. Step 1: Recall Tkinter's method for scheduling

    Tkinter uses the after method to schedule functions after a delay in milliseconds.
  2. Step 2: Identify correct syntax

    The correct syntax is label.after(1000, update_function) to call update_function after 1000 ms (1 second).
  3. Final Answer:

    label.after(1000, update_function) -> Option C
  4. Quick Check:

    Use after() to schedule updates [OK]
Quick Trick: Use after() method for timed updates in Tkinter [OK]
Common Mistakes:
MISTAKES
  • Using update() which refreshes immediately
  • Using non-existent methods like refresh() or repeat()
  • Confusing after() with update()

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