Introduction to Numpy
The NumPy system is an open source numerical computing extension to Python. This tool can be used to store and manipulate large matrices much more efficiently than Python's own nested list structure (which can also be used to represent matrices). NumPy is said to turn the Python equivalent into a free and more powerful MatLab system.
Foreign name: numpy
Meaning: an open source numerical extension for Python
What: A powerful N-dimensional array object Array
Purpose: Storage and processing of large matrices
A scientific computing package implemented in python. Includes : 1, a powerful N-dimensional array object Array; 2, a more mature (broadcast) function library; 3, for the integration of C / C + + and Fortran code toolkit; 4, practical linear algebra, Fourier transforms and random number generator functions. numpy and sparse matrix operation package scipy with the use of more convenient.
NumPy (Numeric Python) provides a number of advanced numerical programming tools such as: matrix data types, vector processing, and a sophisticated arithmetic library. It is designed for rigorous numerical processing. It is used by many large financial firms, as well as by core scientific computing organizations such as Lawrence Livermore and NASA for tasks that would otherwise be done in C++, Fortran, or Matlab.
numpy download and installation tutorial (windows system)
Tools Ingredients:
Installed python program
numpy installation files
First download the numpy installer file for your computer. I am python3.6 version, 64 bit windows system, so the download is this: numpy-1.13.1+mkl-cp36-cp36m-win_amd64.whl
Download Address:Address 1orAddress 2
File Location:
Once downloaded, place the files in the scripts folder in the python installation directory. This folder should also contain pip and easy_install if python is installed correctly.
Add system variables:
Then add the above folder path to the system variables.
The method is as follows: Copy the directory Scripts, then "Right-click Computer-Properties-Advanced System Settings-Environmental Variables-System Variables-path-Edit it" and paste the path into it.
Attention:The above does not work because I have already added the Python36 folder to the path. (Because it's already in the Python36 folder.) For example, look at the following image
So there's no need to think about system variables. Proceed as follows.
Enter it at the dos command:
Enter the first line;
The latter command shows that the installation was successful.
Verify that it was successful:
Type python
Appears >>> (as shown)
(If it does not appear it means that the Python environment has not been set up successfully.) Please seehere are
retypeimpot numpy
No anomalies means it worked.
Below:
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