python计算圆周率pi的方法

from sys import stdout 
scale = 10000 
maxarr = 2800 
arrinit = 2000 
carry = 0 
arr = [arrinit] * (maxarr + 1) 
for i in xrange(maxarr, 1, -14): 
  total = 0 
  for j in xrange(i, 0, -1): 
    total = (total * j) + (scale * arr[j]) 
    arr[j] = total % ((j * 2) - 1) 
    total = total / ((j * 2) - 1) 
  stdout.write("%04d" % (carry + (total / scale))) 
  carry = total % scale 

运行结果如下：

31415926535897932384626433832795028841971693993751058209749445923078164062862089986280348253421170679821480865132823066470938446095505822317253594081284811174502841027019385211055596446229489549303819644288109756659334461284756482337867831652712019091456485669234603486104543266482133936072602491412737245870066063155881748815209209628292540917153643678925903600113305305488204665213841469519415116094330572703657595919530921861173819326117931051185480744623799627495673518857527248912279381830119491298336733624406566430860213949463952247371907021798609437027705392171762931767523846748184676694051320005681271452635608277857713427577896091736371787214684409012249534301465495853710507922796892589235420199561121290219608640344181598136297747713099605187072113499999983729780499510597317328160963185

希望本文所述对大家的Python程序设计有所帮助。