文章摘要:python怎么从函数库中调用pi 如何在Python中调用库函数
python从函数库调用pi,具体方法如下: import sys import math defmain(a […]
python从函数库调用pi,具体方法如下:
import sys
import math
defmain(argv):
iflen(argv) !=1:
sys.exit('Usage: calc_pi.py ')
print'
Computing Pi v.01
'
a=1.0
b=1.0/math.sqrt(2)
t=1.0/4.0
p=1.0
foriinrange(int(sys.argv[1])):
at=(a+b)/2
bt=math.sqrt(a*b)
tt=t-p*(a-at)**2
pt=2*p
a=at;b=bt;t=tt;p=pt
my_pi=(a+b)**2/(4*t)
accuracy=100*(math.pi-my_pi)/my_pi
print"Pi is approximately: "+str(my_pi)
print"Accuracy with math.pi: "+str(accuracy)
if__name__=="__main__":
main(sys.argv[1:])