pi generator

import math
   def pi_finder(n):
     """ caclulate pi to n decimal places """
     denominator = 3.0
     toggle = 1
     count = 1
     accumulator = 0
     while (count <= n):
      accumulator = accumulator + (toggle* (1/denominator))
      denominator += 2
      toggle = toggle * -1
      count = count + 1
      print("in loop accumulator =>", accumulator,
                  "toggle => ", toggle,
                  "count => ", count)
    print("accumulator: " , accumulator)
    pi = 4.0*(1-accumulator)
    return pi