if t: times.append((t,n+'s' if t > 1 else n)) <

format_duration(3602)

'0 year, 0 day, 1 hours, 0 minute and 2 seconds'

to remove unnecessary zeros:

if int(t): times.append((t,n+'s' if t > 1 else n))

in my jypitelab notebook my python script work properly =)
but here i've got :

STDERR:

Traceback (most recent call last):
File "/workspace/default/tests.py", line 2, in
from solution import row_sum_odd_numbers
ImportError: cannot import name 'row_sum_odd_numbers' from 'solution' (/workspace/default/solution.py)