You can set a delay in your Python script by passing the number of seconds you want to delay to the sleep function:
This means you want the script to delay 5 seconds before continuing. The sleep function also accepts floats if you want to give a more precise number:
This will sleep for 1 second and 750 milliseconds. You can also use a float to delay for less than a second like this:
This will sleep for half of a second. You can and should read more about Python's sleep function here.