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numpy數組及處理:效率對比

class etime 數組 for start 處理 .com import 圖片

def pySum(n):
    a = list(range(n))
    b = list(range(0,3*n,3))
    c = []
    for i in range(len(a)):
        c.append(a[i]**2+b[i]**3)
    return c


import numpy
def nySum(n):
    a = numpy.arange(n)
    b = numpy.arange(0,3*n,3)
    c = a**2 + b**3
    return c

import datetime
start = datetime.datetime.now()
pySum(
200000) delta = print(datetime.datetime.now()-start) start1 = datetime.datetime.now() nySum(200000) delta = print(datetime.datetime.now()-start1)

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numpy數組及處理:效率對比