Several common methods to install python libraries using pip

Several ways to use pip to install python libraries

1. Use pip to install online

1.1 Install a single package

The format is as follows:

pip install SomePackage

The example is as follows:

For example: pip install scipy

or specify the version Installation: pip install scipy==1.3.0

1.2 Install multiple packages

The example is as follows:

pip install -r req.txt

req.txt can be obtained through the following command:

pip freeze > req.txt

Related recommendations: "Python Video Tutorial"

1.3 Other issues with online installation

1.3.1 Proxy issues

If you need to go through a proxy For installation, you can use the following format:

pip --proxy=ip:port install SomePackage

1.3.2 pip source problem

If the pip source is too slow, you can replace the pip source. There are two ways:

Method 1 : Temporarily modify the pip source by modifying parameters

For example, use Alibaba Cloud's pip source:

pip install Sphinx -i http://mirrors.aliyun.com/pypi/simple/ --trusted-host mirrors.aliyun.com

Method 2: Permanently modify the pip source by modifying the configuration file

File: ~/ .pip/pip.conf

For example, use Alibaba Cloud’s pip source:

[admin@localhost .pip]$ cat ~/.pip/pip.conf
[global]
index-url = http://mirrors.aliyun.com/pypi/simple/
extra-index-url=http://mirrors.aliyun.com/pypi/simple/
[install]
trusted-host = mirrors.aliyun.com
[admin@localhost .pip]$

You can also use a self-built pip source, or other public pip sources, such as:

Ali Cloud http://mirrors.aliyun.com/pypi/simple/

Douban (douban) http://pypi.douban.com/simple/

Tsinghua University https://pypi .tuna.tsinghua.edu.cn/simple/

University of Science and Technology of China http://pypi.mirrors.ustc.edu.cn/simple/

2. From the source code The installation

example is as follows:

git clone https://github.com/sphinx-doc/sphinx
cd sphinx
pip install .

3. Install from the whl file

The format is as follows:

pip install SomePackage.whl

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