def randbelow(exclusive_upper_bound):
 if (exclusive_upper_bound <= 0):
  raise ValueError('Upper bound must be positive.')
 return _sysrand._randbelow(exclusive_upper_bound)

def randbelow ( exclusive_upper_bound ) : if ( exclusive_upper_bound <= 0 ) : raise ValueError ( 'Upper bound must be positive.' ) return _sysrand . _randbelow ( exclusive_upper_bound )
return a random int in the range [0 .