Python 5b - Sleep
Using Sleep
To pause a program, import sleep from the time library.
Type the word sleep followed by the number of seconds that you wish the program to break for in brackets. It must be a whole number.
​
Below is an example of a program that imports the sleep command and waits for 2 seconds between printing:
from time import sleep
​
print("Hello!")
sleep(2)
print("Goodbye!")
You can implement the sleep command within a for loop to produce an effective timer that outputs each second waited to the screen:
You could also use a variable instead of a fixed value with the sleep command such as below:
from time import sleep
​
for second in range(1,11):
print(second)
sleep(1)
from time import sleep
​
seconds = int(input("How many seconds should I sleep? "))
​
print("Going to sleep...")
sleep(seconds)
print("Waking up!")
Sleep Task (Slow Calculator)
Create a slow calculator program that needs time to think in between calculations.
​
Print a message to greet the user, then wait 3 seconds and ask them to enter a number.
​
Wait another 3 seconds and ask them to enter a second number.
Wait 2 more seconds, print “Thinking…” then 2 seconds later print the total of the two numbers added together.
Example solution:
