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May 28, 2009 at 14:08. 1. For loops are used when you want to do operations on each member of a sequence, in order. While loops are used when you need to: operate on the elements out-of-order, access / operate on multiple elements simultaneously, or loop until some condition changes from True to False. – apraetor.
It's bad programming." While I try to avoid them as a general rule, many times I have simplified logic structures in a while loop simply by using a single break statement. While I agree that 15 break statements scattered through a while loop isn't great, I would posit that neither is 200 lines of code. –
period=0. tmp=universe_array. while True: tmp=apply_rules(tmp)#aplly_rules is a another function. period+=1. if numpy.array_equal(tmp,universe_array) is True: break #i want the loop to stop and return 0 if the. #period is bigger than 12. if period>12: #i wrote this line to stop it..but seems it.
193. The easiest way is to just interrupt it with the usual Ctrl-C (SIGINT). try: while True: do_something() except KeyboardInterrupt: pass. Since Ctrl-C causes KeyboardInterrupt to be raised, just catch it outside the loop and ignore it. edited Nov 1, 2012 at 16:18.
Try the following: import time. timeout = time.time() + 60*5 # 5 minutes from now. while True: test = 0. if test == 5 or time.time() > timeout: break. test = test - 1. You may also want to add a short sleep here so this loop is not hogging CPU (for example time.sleep(1) at the beginning or end of the loop body).
My code never goes out of the while loop even if the variable is assigned 1 or 2 or 3. Am I missing something here or doing something wrong? I never read any documentation about Python that said or statements wouldn't work in while loops. According to propositional calculus this should be correct because True or False or False = True
Here's a very simple way to emulate a do-while loop: condition = True. while condition: # loop body here. condition = test_loop_condition() # end of loop. The key features of a do-while loop are that the loop body always executes at least once, and that the condition is evaluated at the bottom of the loop body.
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 should just accept that feeling :) –
1. This is the right way to plot Dynamic real-time matplot plots animation using while loop. There is a medium article on that too: pip install celluloid # this will capture the image/animation. import matplotlib.pyplot as plt. import numpy as np. from celluloid import Camera # getting the camera.
To have a function run every so many minutes at the beginning of the minute, the following works well: schedule.every(MIN_BETWEEN_IMAGES).minutes.at(":00").do(run_function) where MIN_BETWEEN_IMAGES is the number of minutes and run_function is the function to run. – Nicholas Kinar.