I have a while loop, and I want it to keep running through for 15 minutes. it is currently: while True: #blah blah blah (this runs through, and then restarts. I need it to continue doing this ...

Jan 29, 2009 · Changing the index variable i from within the loop is unlikely to do what you expect. You may need to use a while loop instead, and control the incrementing of the loop variable yourself. Each time around the for loop, i is reassigned with the next value from range(). So …

Python has control flow statements instead of goto statements. One implementation of control flow is Python's while loop. You can give it a boolean condition (boolean values are either True or False in Python), and the loop will execute repeatedly until that condition becomes false.

Every time I write a while loop where the variable that the condition checks is set inside the loop (so that you have to initialize that variable before the loop, like in your second example), it doesn't feel right. And then I search for python repeat until to remind myself that I …

Good point about about putting the timeout check in the while loop condition. As for the comment about time.sleep(), the code does no work so will be cycling through the loop as fast as it can go. By adding a short time.sleep() the CPU can go idle …

This means the loop will be executed as long as the value of the variable 'loop' remains 4. But since you assign 2 to loop, the condition is not satisfied, and control goes out of the loop. One solution would be to change condition as:-while loop == 2: Or, another solution would be to remove the statement assigning 2 to loop altogether.

Mar 28, 2013 · You've forgotten to reset the value of num (and also even and odd) inside the outer while loop (before starting the while num < 100 loop). Second time in, it doesn't need to execute the inner loop or calculate any random numbers at all because num is already 100

You need to understand that the break statement in your example will exit the infinite loop you've created with while True. So when the break condition is True, the program will quit the infinite loop and continue to the next indented block. Since there is no following block in your code, the function ends and don't return anything.

Feb 11, 2010 · The Errors and Exceptions section of the Python tutorial would be a good place to start with basic exception handling in Python. In general, exceptions are not ideal for your situation anyway—a simple while loop should be sufficient. Exceptions should be reserved for exceptional situations, and bad user input is not exceptional, it's expected.

Apr 20, 2016 · Need to add a loop to my calculator by giving the user an option to restart the calculator by putting the code in a while loop with the condition that the input from user should be, 'y' or 'Y'. ...