def crossing_num_calc1(a):
global collection
feature_vector = {}
continuing_ridge = 0
bifurcation_point = 0
isolate_point = 0
ridge_ending = 0
crossing_point = 0
list1 = range(375)
num_cores = multiprocessing.cpu_count()
results = Parallel(n_jobs=num_cores)(delayed(calc_i)(i) for i in list1)
print(results.__len__())
return collection, isolate_point, ridge_ending, continuing_ridge, bifurcation_point, crossing_point
