Python writing files in parallel crashes computer randomly -


i writing piece of code takes input user code , each code creates file , writes something. have write 10k files, code wrote computer randomly crashes. after 40 files written, after 2500.

def createuseritemfinalarray(user):     stringfile = "/home/alvin/pycharmprojects/recsys/files/tagssimilaritycb/userfinalarrayscosine/"     stringfile += str(user) + ".csv"     interacteditems = userinteractiondict[user]     interactedjobsmatrix = itemattributematrix[interacteditems, :]     open(stringfile, "w") csvfile:         writer = csv.writer(csvfile, delimiter="\t", quoting=csv.quote_none)         writer.writerow(['nonzerocolumns', 'nonzerovalues'])         if (len(interacteditems) == 0):             writer.writerow(['[]', '[]'])         else:             simmatrix = sp.sparse.csc_matrix(                 cosine_similarity(interactedjobsmatrix, comparationmatrix, dense_output=false))             simmatrix = simmatrix.toarray()             simmatrix = sp.sparse.csc_matrix(bn.nanmean(simmatrix, axis=0))             nonzerocolumn = simmatrix.nonzero()[1]             similarityvalues = simmatrix.data             nonzerocolumn = list(map(str, nonzerocolumn))             similarityvalues = list(map(str, similarityvalues))             nonzerocolumn, similarityvalues = formatarraystowrite(nonzerocolumn, similarityvalues)             writer.writerow([nonzerocolumn, similarityvalues])     stop = time.time()     print("time taken: ", stop - start, "calculated user: ", user)

this how called function. went n_jobs = 4 n_jobs = 2. recall, computer crashed without launching in parallel. targetusers list of users need create file

    parallel(n_jobs=2)(delayed(createuseritemfinalarray)(user) user in targetusers)

at first thought maybe had problems closing of files. after adding close manually nothing changed. interactedjobsmatrix , comparationmatrix both sparse matrices. big sparse well.


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