Python package management tool—pip installation and usage guide

This article mainly introduces the installation and use guide of Python's package management tool-pip. The editor thinks it is quite good, so I will share it with you now and give it as a reference. Let’s follow the editor to take a look

【Preface】

Python has two famous package management tools easy_install.py and pip. In the Python2.7 installation package, easy_install.py is installed by default, but pip requires us to install it manually.

pip can run on Unix/Linux, OS X, and Windows platforms, supporting CPython versions 2.6, 2.7, 3.1, 3.2, 3.3, 3.4 and also pypy.

【 Download】

Download the pip installation package get-pip.py, download address: https://pip.pypa.io/en/latest/installing.html#id7

【Install pip on Windows】

Starting from pip v1.5.1, the installation becomes very simple, directly as an administrator, where get-pip.py is located Run

python get-pip.py

After the execution is completed, in the Scripts subdirectory under the python installation directory, you can see pip.exe, pip2.7.exe, pip2.exe, etc., which means pip installation It worked.

Note: If you want to run the pip program directly on the command line, you need to add the scripts directory to the environment variable PATH.

When installing pip, you can also use the installation options to install, such as specifying the location of get-pip.py:

python get-pip.py --no-index --find-links=c:\downloads

[Install pip on Linux]

In Linux, you can install it easily by using the package management tool on the corresponding Linux distribution. For example:

On Debian and Ubuntu:

sudo apt-get install python-pip

On Fedora:

sudo yum install python-pip

【Upgrade pip】

On Linux or OS X:

pip install -U pip

On Windows ：

python -m pip install -U pip

【Usage】

Install a package from PyPI:

pip install SomePackage

Install a specific version of a package by specifying a version number using ==, >=, d2e24fbfa3a7d998970671c0359d3643, 39c661228974820de106e8fa9d6b08a62.0,<2.0.3

If there are requirements, just pip install -r requirements.txt to install them all .

Uninstall a package:

pip uninstall SomePackage

Upgrade a package:

pip install --upgrade SomePackage

Show what files were installed:

pip show --files SomePackage

List what packages are outdated:

pip list --outdated

【Practice】

install selenium on windows 7:

##Verify, hit Start--All Programs-- Python 2.7 ---IDLE (Python GUI), enter the following code and execute it. If no error is reported, it means selenium is installed successfully.

from selenium import webdriver
from selenium.common.exceptions import TimeoutException
from selenium.webdriver.support.ui import WebDriverWait

Another method is to execute

pip show --files selenim

The execution result is to list all the files of the selunium package.

【References】

https://pypi.python.org/pypi/pip

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