decimal_ex.py

import decimal

check_state_every = decimal.Decimal('2.0')
spin_every = decimal.Decimal('0.2')
elapsed = decimal.Decimal('0')

while True:
    print elapsed
    print check_state_every
    print (elapsed % check_state_every)
    print (elapsed % check_state_every) == 0
    print

    elapsed = elapsed + spin_every
    if elapsed > 3:
        break