Python automatically installs third-party class libraries

Python in the use of the process will use a large number of third-party libraries, a manual to download, installation more cumbersome. You can configure a third-party mirror source and use PIP for automatic installation. It is recommended to choose the image source of watercress: http://pypi.douban.com/simple/

Installation introduction under Windows (My environment is Win7+python 2.7.12)

1. Check that the PIP is installed. Typically, the Python installation finishes automatically. The check method is as follows:

C:\python27\scripts>dir

The volume in drive C is the system

The serial number of the volume is 0000-0a6f

Directory of C:\Python27\Scripts

2017/01/08 09:52 <DIR>.

2017/01/08 09:52 <DIR>.

2016/12/05 23:29 89,448 Easy_install-2.7.exe

2016/12/05 23:29 89,448 Easy_install.exe

2017/01/08 09:52 89,420 pip.exe

2017/01/08 09:52 89,420 pip2.7.exe

2017/01/08 09:52 89,420 pip2.exe

5 Files 447,156 bytes

2 Directories 19,888,021,504 bytes available

1. Add the PIP path to the path variable for easy follow-up execution. You do not need to go to the PIP path at a time. The configuration method is as follows:

The system variable, environment variable, advanced system settings, properties----"Path", click "Edit", add;; C:\Python27\Scripts

The results are as follows:

cmd command to execute PIP, the following shows the configuration success. Ps:cmd window needs to exit login again

C:\users\administrator>pip

USAGE:PIP <command> [Options]

2. Get the HomePath variable and create the%homepath%\pip\pip.ini file. If there is no directory under the%homepath% directory, create the PIP directory and the Pip.ini file yourself

C:\users\administrator>set HomePath homepath=\users\administrator

3, add the relevant content and save in the Pip.ini file, add content as follows:

[Global] Index-url = http://pypi.douban.com/simple [Install] trusted-host = pypi.douban.com

4, Test. Automatically download and install the Pexpect class library. As follows

c:\users\administrator>pip Install pexpect collecting pexpect downloading http://pypi.doubanio.com/ Packages/5b/16/4859a0376be8b87bf3920b1f6e63b8a3c0ee42488babee07c87ca9316e03/pexpe CT-4.2.1-PY2.PY3-NONE-ANY.WHL (55kB) 100% |████████████████████████████████| 61kB 240kb/s collecting ptyprocess>=0.5 (from pexpect) downloading http://pypi.doubanio.com/packages/40/a5/ 184B46A3C986000196ABD077166B2536ACB2500009BEC95FEB9B8FC19828/PTYPR OCESS-0.5.1-PY2.PY3-NONE-ANY.WHL Installing Collected Packages:ptyprocess, Pexpect successfully installed Pexpect-4.2.1 ptyprocess-0.5.1

5, the installation is successful.

Python automatically installs third-party class libraries