RPS v3.00

Use rpsrunner.py to play unranked matches on your computer.

Source code:

import random

def mdl(N):
    N%=3
    if N<0:
       N+=3
    return N

if not input:
   com={'RR':'1','RP':'2','RS':'3','PR':'4','PP':'5','PS':'6','SR':'7','SP':'8','SS':'9'}
   ego={'1':0,'2':1,'3':2,'4':0,'5':1,'6':2,'7':0,'8':1,'9':2}
   idt={'1':0,'2':0,'3':0,'4':1,'5':1,'6':1,'7':2,'8':2,'9':2}
   k2i={'R':0,'P':1,'S':2}
   i2k={0:'R',1:'P',2:'S'}
   hist=[0]*3
   eval=[0]*3
   subs=[0]*6
   prin=[[0]*4]*6
   meta=[0]*4
   DNA=""
   flag=False
   output=random.choice("RPS")
else:
   DNA+=com[output+input]
   if flag:
      for j in range(4):
          M=prin[0][j]
          k=0
          for i in range(1,6):
              if prin[i][j]>M:
                 M=prin[i][j]
                 k=i
          re=mdl(subs[k]-k2i[input])
          if re==2:
             meta[j]-=1
          else:
             meta[j]+=re
      for i in range(6):
          prin[i][1]*=0.9
          prin[i][3]*=0.9
          re=mdl(subs[i]-k2i[input])
          if re==0:
             for j in range(2,4):
                 prin[i][j]-=0.1
          elif re==1:
             for j in range(4):
                 prin[i][j]+=1
          elif re==2:
             for j in range(4):
                 if j<2 or prin[i][j]<2:
                    prin[i][j]-=1
                 else:
                    prin[i][j]*=0.5
   for i in range(3):
       hist[i]=0
   i=-1
   j=min(5,len(DNA))
   while i<0 and j>1:
         j-=1
         RNA=DNA[-j:]
         i=DNA.find(RNA,0,-1)
   while i>=0:
         hist[ego[DNA[i+j]]]+=1
         i=DNA.find(RNA,i+1,-1)
   output=random.choice("RPS")
   flag=(hist[0]<>hist[1]) or (hist[1]<>hist[2])
   if flag:
      for i in range(3):
          eval[i]=hist[mdl(i-1)]-hist[mdl(i+1)]
      j=eval.index(max(eval))
      for i in range(3):
          subs[i]=mdl(j-i)
      for i in range(3):
          hist[i]=0
      i=-1
      j=min(5,len(DNA))
      while i<0 and j>1:
            j-=1
            RNA=DNA[-j:]
            i=DNA.find(RNA,0,-1)
      while i>=0:
            hist[idt[DNA[i+j]]]+=1
            i=DNA.find(RNA,i+1,-1)
      for i in range(3):
          eval[i]=hist[mdl(i-1)]-hist[mdl(i+1)]
      j=eval.index(max(eval))
      for i in range(3):
          subs[i+3]=mdl(j-i)
      M=max(meta)
      j=meta.index(M)
      if M>0:
         M=prin[0][j]
         k=0
         for i in range(1,6):
             if prin[i][j]>M:
                M=prin[i][j]
                k=i
         if M>0:
            output=i2k[subs[k]]