loops - Execute statement every N iterations in Python -

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i have long loop, , check status every n iterations, in specific case have loop of 10 million elements , want print short report every millionth iteration.

so, doing (n iteration counter):

if (n % 1000000==0):     print('progress report...')

but worried slowing down process computing modulus @ each iteration, 1 iteration lasts few milliseconds.

is there better way this? or shouldn't worry @ modulus operation?

how keeping counter , resetting 0 when reach wanted number? adding , checking equality faster modulo.

printcounter = 0  # whatever while loop in python while (...):        ...     if (printcounter == 1000000):         print('progress report...')         printcounter = 0     ...     printcounter += 1

although it's quite possible compiler doing sort of optimization already... may give peace of mind.


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