Install nump with the pip command of Python

To import the script directory in the Python installation directory into the environment variable path

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"In Windows DOS Window execution: pip

"will show information about PIP.

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is performed in the DOS interface in Windows: Pip install Nump

The system will automatically download the Nump package and complete the appropriate installation

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"Because I have installed it, so there will be no download progress bar (Note: The download is relatively slow)

Premise: You have installed the python3.5.2

"python3.5.2 download Link: Python official website

"Test Case:

# import the necessary packagesimport numpy as npdef chi2_distance ( HISTA, HISTB, EPS = 1E-10):         # compute  the chi-squared distance    d = 0.5 * np.sum ([((A  - B)  ** 2)  /  (a + b + eps)          for  (a, b)  in zip (HISTA, HISTB)])     sum =  0;    for  (A, B)  in zip (HISTA, HISTB):         E  =  ((a - b)  ** 2)  /  (a + b  + eps)         Sum += E         print Sum/2    # return the chi-squared  distance    Return dd = chi2_distance ([0,1,2,3,4],[4,3,2,1,0]) # print d 

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Install nump with the pip command of Python