pi

OverflowError: (34, ‘Result too large’)

Python floats are neither arbitary precision nor of unlimited size. When k = 349, 16.**k is much too large – that’s almost 2^1400. Fortunately, the decimal library allows arbitrary precision and can handle the size: import decimal decimal.getcontext().prec = 100 def pi(): pi = decimal.Decimal(0) for k in range(350): pi += (decimal.Decimal(4)/(decimal.Decimal(8)*decimal.Decimal(k+1))…)