algorithm - Calculating pi in Python using geometry -


i'm posting code hope community willing assist me in ironing out bugs can't seem able tackle. it's quite short, intended guess pi, , not intended replace efficiently working approaches. not assignment.

# code broken  math import sqrt  def get_y(x, r):     return sqrt((r^2.0)-(x^2.0))  def get_distance(x1, y1, x2, y2):     return sqrt( (x2-x1)^2.0 + (y2-y1)^2.0 )  def c(r):     def range(b):         = 0         while < b:             yield             = + 1     circumference = 0.0     x1 in range(r):         x2 = x1 + 1.0         y1 = get_y(x1, r)         y2 = get_y(x2, r)         distance = get_distance(x1, y1, x2, x2)         circumference = circumference + distance     circumference = circumference * 4     return circumference  print get_y(0, 4) radius = 400.0 print "%.64f" % (c(radius) / radius * 2) 

# not broken anymore, prints 3.1415559...  math import sqrt  def get_y(x, r):     return sqrt((r**2.0)-(x**2.0)) # first mistake: ** exponentiation, not ^  def get_distance(x1, y1, x2, y2):     return sqrt( (x2-x1)**2.0 + (y2-y1)**2.0 )  def c(r):     # def range(b): # redundant     #     = 0     #     while < b:     #         yield     #         = + 1     circumference = 0.0     x1 in range(r):         x2 = x1 + 1.0         y1 = get_y(x1, r)         y2 = get_y(x2, r)         distance = get_distance(x1, y1, x2, y2) # second mistake, x2, x2 --> x2, y2         circumference = circumference + distance     circumference = circumference * 4     return circumference  print get_y(0, 4) radius = 400.0 print "%.64f" % (c(radius) / (radius * 2)) # third mistake: / radius * 2 --> / (radius*2) 

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