Number split from a string is not numeric

Question

duration = inputScriptLine.split(' ', 1)[1]
if type(duration) == str:
    print '    Error: Sleep duration "' + duration + '" is not numeric'

given SLEEP 50, I get Error: Sleep duration "50" is not numeric

I am not too concerned as to why, I just want to know how I can code so that SLEEP 50 is valid and SLEEP APNOEA is not.

Answer 1

Use isdigit():

if not duration.isdigit():
    print 'Error: Sleep duration "' + duration + '" is not numeric'

It would check whether all characters in duration are digits or not.