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  1. from mpi4py import MPI
  2.  
  3. comm = MPI.COMM_WORLD
  4. rank = comm.rank
  5. if rank == 0:
  6.     noOfIterations = int(input("Enter number of iterations : "))
  7.     noOfProcesses = int(input("Enter number of processes to spawn : "))
  8.     iterationsPerProcess = noOfIterations // noOfProcesses
  9.     ss=0
  10. else:
  11.     noOfIterations = None
  12.     noOfProcesses = None
  13.     iterationsPerProcess = None
  14.     ss=None
  15.  
  16. def calcPi()->float:
  17.     n = comm.bcast(noOfIterations, root = 0)
  18.     p = comm.bcast(noOfProcesses, root = 0)
  19.     i = comm.bcast(iterationsPerProcess, root = 0)
  20.     s = comm.bcast(ss, root = 0)
  21.     k = (2*rank)+1
  22.     flag=False
  23.     if p%2 == 0:
  24.         if rank %2 == 0:
  25.             for x in range(i):
  26.                 s+=4/k
  27.                 k = k+(2*p)
  28.         else:
  29.             for x in range(i):
  30.                 s-=4/k
  31.                 k = k+(2*p)       
  32.     else: ########## here #########
  33.         if rank %2 == 0:
  34.             for x in range(i):
  35.                 if flag == False:
  36.                     s+=4/k
  37.                 else:
  38.                     s-=4/k
  39.                 flag = not flag
  40.                 k = k+(2*p)
  41.         else:
  42.             for x in range(i):
  43.                 if flag == False:
  44.                     s-=4/k
  45.                 else:
  46.                     s+=4/k
  47.                 flag = not flag
  48.                 k = k+(2*p)
  49.     newData = comm.gather(s,root=0)
  50.  
  51.     if rank == 0:
  52.         print(newData)
  53.         print(sum(newData))
  54.  
  55. calcPi()
  56.  
Success #stdin #stdout #stderr 0.29s 38976KB
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Standard input is empty
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Standard output is empty
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Error: unexpected symbol in "from mpi4py"
Execution halted
https://ideone.com/GG4Ar1
language:
R (R 3.5.2)
created:
1 year ago
visibility:
public

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