The method of pi in Python _python

This article describes the Python method of Pi, is a translation from the foreign website of the article, to share with you for your reference.

The implementation methods are as follows:

#_ *_ Coding=utf-8 *_* # {{http://code.activestate.com/recipes/578130/(R5) def Pi (places=10): "" "Computes Pi to give n Number of decimal places parameter places represents the post-decimal point of the PI to return: first expand the 10**8 (10 of eight) times, then the calculation is completed and then reduce the eight times "" "# 3 + 3* ( 1/24) + 3* (1/24) * (9/80) + 3* (1/24) * (9/80) * (25/168) # The numerators 1, 9, ... are given by (2x + 1) ^ 2 # The Deno Minators, are given by (16x^2-24x + 8) Extra = 8 one = ten * * * (Places+extra) T, c, N, na, d, da = 3*one, 
    3*one, 1, 0, 0, #这里的n and D are the numerator and denominator of each item respectively, and Na and Da are numerator and denominator, respectively. The value added to the previous item #这里的//is not the annotation in C + +, but the meaning while T > 1: N, na, d, da = N+na, na+8, D+da, da+32 t = t * N//D C + + t return c//(extra) def picirc (radius, Aspe
  ct_ratio=5): "" "Display the digit of Pi in a circle of given radius radius: radius of the display Aspect_ratio: Adjust the displayed ratio parameter" "" #display_width为各行的显示长度 display_width = Int (RADIUS * aspect_ratio +) Pi_str = repr Pi (int (2 * RADIUS * * 2 * aspect_r Atio)) pos = 0 #cols number of digits to display for I in range (2 * radius): cols = Int (0.5 + aspect_ratio * (Radius**2-(radius-(i+0.5)) **2) * * 0.5) Print (Pi_str[pos:pos+cols].center (display_width)) #将产生的pi数值生成的文本列表中相应的位数取出来显示在当前行 pos + cols If __name__ = = ' __

 Main__ ': Picirc (#) # # End of Http://code.activestate.com/recipes/578130/}}}

The results displayed are:

                  31415926535897932384 6264338327950288419716939937510582 0974944592307816406286208998628034825342117 067982148086513282306647093844609550582231725 35940 81284811174502841027019385211055596446229489549303819644 28810975665933446128475       
      6482337867831652712019091456485669234 6034861045432664821339360726024914127372458700660631558817488152 09209628292540917153643678925903600113305305488204665213841469519415 116094330572703657595919530921861     
    17381932611793105118548074462379962749     
    5673518857527248912279381830119491298336733624406566430860213949463952247    
   371907021798609437027705392171762931767523846748184676694051320005681271452    
   63560827785771342757789609173637178721468440901224953430146549585371050792279 689258923542019956112129021960864034418159813629774771309960518707211349999998 3729780499510597317328160963185950244594553469083026425223082533446850352619311   
   88171010003137838752886587533208381420617177669147303598253490428755468731159562   
   86388235378759375195778185778053217122680661300192787661119590921642019893809525   
   72010654858632788659361533818279682303019520353018529689957736225994138912497217   
   75283479131515574857242454150695950829533116861727855889075098381754637464939319   
   2550604009277016711390098488240128583616035637076601047101819429555961989467678   
   374494482553797747268471040475346462080466842590694912933136770289891521047521    
    62056966024058038150193511253382430035587640247496473263914199272604269922796    
    782354781636009341721641219924586315030286182974555706749838505494588586926 9956909272107975093029553211653449872027559602364806654991198818347977535 6636980742654252786255181841757467289 0977772793800081647060016145249192 17321721477235014144197356854816136115735255213347574184946843852332 3907394143334547762416862518983569485562099219222184272550254256 887671790494601653466804         
          988627232791786085784383827967976681 45410095388378636095068006422512520511739298489608412848 86269456042419652850222106611863067442786220391949 45047123713786960956364371917287467764657                  

 57 3962413890865832645995813390478027 59009946576407895126

I hope this article will help you with your Python programming.