57 lines
1.3 KiB
Python
57 lines
1.3 KiB
Python
#
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# @Mateusz779
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#
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from decimal import Decimal
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from decimal import getcontext
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import time
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from multiprocessing.dummy import Pool as Pool #pip3 install multiprocess
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from tqdm import tqdm #pip3 install tqdm
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threads=4 #threads number
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count = 10000 #number of numbers after the point
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thread_list = []
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count=count+1
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list_all = {}
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pbar = tqdm(total =count)
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def pi(start):
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getcontext().prec=count-start
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for k in range (start,int(start+one_count)):
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pbar.update(1)
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list_all[k]=(1/Decimal(16)**k * (Decimal(4)/(8*k+1) - Decimal(2)/(8*k+4) - Decimal(1)/(8*k+5) - Decimal(1)/(8*k+6)))
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start_table = []
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if count >500:
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th=int(threads*(count/1000))
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else:
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th=1
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while count%th!=0:
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if count>th:
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th=th+1
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else:
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th=th-1
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one_count=int(count/th)
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for i in range(th):
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start_table.append(int((one_count*i)))
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start = time.time()
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with Pool(processes=threads) as pool:
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results = pool.starmap(
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pi,
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iterable=zip(start_table),
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chunksize=100000 // threads
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)
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end = time.time()
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result=0
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getcontext().prec=count
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sort = sorted(list_all.items())
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for i in sort:
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result=result+i[1]
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print(Decimal(result))
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print("\n\n")
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print("Elapsed time: ",end - start,"s\n")
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