How can I show never ending dots ("...") in a while loop [duplicate]

Question

Is it possible to show something like this in Python?

Checking.

Checking..

Checking...

Checking.

I want it to just show one line of this while the script is running, but stop when it's done. The script I want to add it to is here: https://github.com/brandonusher/Python-Scripts/blob/master/check_port.py

Answer 1

Output the text with no newline character, then flush stdout. Output a \r to make the cursor go back to the beginning of the line. Repeat until done. Don't forget to overwrite existing text.

while True:
  sys.stdout.write('\rfoo.  ')
  sys.stdout.flush()
  delay(100)
  sys.stdout.write('\rfoo.. ')
  sys.stdout.flush()
  delay(100)
  sys.stdout.write('\rfoo...')
  sys.stdout.flush()
  delay(100)