forked from china-testing/python-api-tesing
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathvectorsum.py
More file actions
executable file
·53 lines (42 loc) · 1.19 KB
/
vectorsum.py
File metadata and controls
executable file
·53 lines (42 loc) · 1.19 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
#!/usr/bin/env/ python3
# -*- coding: utf-8 -*-
# Author: xurongzhong#126.com 技术支持qq群：6089740
# CreateDate: 2018-04-12
# vectorsum.py
import sys
from datetime import datetime
import numpy as np
"""
该段代码演示Python中的向量加法
使用如下命令运行程序：
python vectorsum.py n
n为指定向量大小的整数
加法中的第一个向量包含0到n的整数的平方
第二个向量包含0到n的整数的立方
程序将打印出向量加和后的最后两个元素以及运行消耗的时间
"""
def numpysum(n):
a = np.arange(n) ** 2
b = np.arange(n) ** 3
c = a + b
return c
def pythonsum(n):
a = list(range(n))
b = list(range(n))
c = []
for i in range(len(a)):
a[i] = i ** 2
b[i] = i ** 3
c.append(a[i] + b[i])
return c
size = int(sys.argv[1])
start = datetime.now()
c = pythonsum(size)
delta = datetime.now() - start
print("The last 2 elements of the sum", c[-2:])
print("PythonSum elapsed time in microseconds", delta.microseconds)
start = datetime.now()
c = numpysum(size)
delta = datetime.now() - start
print("The last 2 elements of the sum", c[-2:])
print("NumPySum elapsed time in microseconds", delta.microseconds)