[Tutor] assert() question

[Dick Moores]

I have a module, mycalc.py, which is a collection of functions designed
to be imported independently.
I've heard about using assert() to check up on whether things are still
working correctly, or something like that. So I've begun to write some
assert() expressions(?)  and put them at the bottom of the
module.
if __name__ ==
'__main__':      
        
assert(numberCommas('7657657.7554') == '7,657,657.7554')
        
assert(intCommas(76576577554) == '76,576,577,554')
        
assert(nextNPrimes(1000000000000,10) == [1000000000039L, 1000000000061L,
1000000000063L, 1000000000091L, 1000000000121L, 1000000000163L,
1000000000169L, 1000000000177L, 1000000000189L, 1000000000193L])
        
maxDiffBetPrimes(101)
        
printTime(1215322947.0320001, 1215322934.0398701)
        
printTime(1215323947.0320001, 1215323011.4567342)
        
printTime(1215322947.0320001, 1215312921.0054233)
OUTPUT:
For primes up through 101, max diff is 8
between the 1 pair(s) of primes [(89, 97)]
Time was 12.99 seconds
Time was 15 minutes, 35 seconds
Time was 2 hours, 47 minutes, 6 seconds
The top three work silently, but I found that I could not figure out
how to use assert() with the functions that print rather than return.
E.g., maxDiffBetPrimes() and printTime(). Is there a
way?
If it'll help, here's printTime():
def printTime(timeEnd, timeStart):
    from mycalc import hmsToText
    timeElapsed = timeEnd - timeStart
    if timeElapsed > 60:
        print "Time was",
hmsToText(timeElapsed)
    else:
        print "Time was %.4g
seconds" % timeElapsed
Thanks,
Dick Moores


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