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 …

Jun 21, 2015 · Python 2.7.3 $ python -mtimeit 'while 0:pass' 100000000 loops, best of 3: 0.0132 usec per loop $ python -mtimeit 'while False:pass' 10000000 loops, best of 3: 0.0538 usec per loop – yingted Commented Dec 24, 2012 at 17:04

In your question, you write "how do I access the loop index, from 1 to 5 in this case?" However, the index for a list runs from zero. So, then we need to know if what you actually want is the index and item for each item in a list, or whether you really want numbers starting from 1. Fortunately, in Python, it is easy to do either or both.

May 28, 2012 · I'm building a kind of question sequence as part of a program in Python 3.2. Basically, I ask a question and await an answer between two possibilities. If the given answer is not part of the two choices, I print a line and would like to re-ask the question until the correct input is given and then move on to the next question and repeat the ...

Mar 19, 2019 · The full code is available to download and run in my python/pandas_dataframe_iteration_vs_vectorization_vs_list_comprehension_speed_tests.py file in my eRCaGuy_hello_world repo. Here is the code for all 13 techniques: Technique 1: 1_raw_for_loop_using_regular_df_indexing

Nov 5, 2024 · First, in Python, if your code is CPU-bound, multithreading won't help, because only one thread can hold the Global Interpreter Lock, and therefore run Python code, at a time. So, you need to use processes, not threads.

Oct 21, 2019 · Python 2.x documentation. Python 3.x documentation. However I doubt you want to do this, unless you just need to put something in as a placeholder until you come back and write the actual code for the if statement. If you have something like this: if condition: # condition in your case being `num2 == num5` pass else: do_something()

I wanted to know if there are any built-in ways to continue to next iteration in outer loop in python. For example, consider the code: for ii in range(200): for jj in range(200, 400): ...

Dec 15, 2017 · @Robin the confusion is a good illustration of the common confusion between while cond do {} and repeat {} until cond loops. A while loop continues as long as its condition is True, a repeat loop continues until its condition is True. @snr is wrong, but it's a common mistake.

list=[0] t=1 for i in list: list.append(i) #do your thing. #Example code. if t<=0: break print(t) t=t/10 This exact loop given above, won't get to infinity. But you can edit the if statement to get infinite for loop. I know this may create some memory issues, but this is the best that I could come up with.