tkinter: how to use after method

Question

Hey I am new to python and am using tkinter for my gui. I am having trouble using the "after" method. The goal is to make a random letter appear every 5 seconds.

Here is my code:

import random
import time
from tkinter import *


root = Tk()

w = Label(root, text="GAME")
w.pack()

frame = Frame(root, width=300, height=300)
frame.pack()

L1 = Label(root, text="User Name")
L1.pack(side=LEFT)
E1 = Entry(root, bd =5)
E1.pack(side=LEFT)


tiles_letter = ['a', 'b', 'c', 'd', 'e']


while len(tiles_letter) > 0:
    rand = random.choice(tiles_letter)
    tile_frame = Label(frame, text=rand)
    tile_frame.pack()
    frame.after(500)
    tiles_letter.remove(rand)  # remove that tile from list of tiles

root.mainloop()

can someone please help me --- the problem is definitely frame.after(500): i'm not sure if it is correct to use "frame" and I don't know what which argument follows the 500.

Thanks

Answer 1

I believe, the 500ms run in the background, while the rest of the code continues to execute and empties the list.

Then after 500ms nothing happens, as no function-call is implemented in the after-callup (same as frame.after(500, function=None))

Answer 2

Without seeing the original data, my guess is that you get the cartesian product because you are iterating three times (.experience[]) within the object construction. You might want to pull out the iteration, maybe save it in a variable, and reference that instead:

.experience[] as $experience | {
  personid: .personid,
  company_name: $experience.company.name,
  sdate: $experience.start_date,
  edate: $experience.end_date
}

Depending on the outer structure of your construction, also the other way around may be appropriate, ie. storing the .person field instead in a variable:

.personid as $id | .experience[] | {
  personid: $id,
  company_name: .company.name,
  sdate: .start_date,
  edate: .end_date
}