from pprint import pprint import json with open("test.txt") as testFile: data = json.load(testFile) #pprint(data) def split_list(alist, wanted_parts=1): length = len(alist) return [ alist[i*length // wanted_parts: (i+1)*length // wanted_parts] for i in range(wanted_parts) ] A = [0,1,2,3,4,5,6,7,8,9] print split_list(A, wanted_parts=1) print split_list(A, wanted_parts=2) print split_list(A, wanted_parts=8) testing = split_list(data, wanted_parts=len(data)/4+1) print(len(testing))