Python2.7 and 3.5 dual version coexistence and PIP usage

1. Python2.7 and 3.5 coexist 1.1 installation

Installation from needless to say, first installed 2.7, then 3.5.

Next installed directory: Py3.5 and Py2.7 The default installation directory is not the same, according to the default is good, no tube.

Python2.7: C:\Python27

Python3.5: C:\Users\Administrator\AppData\Local\Programs\Python\Python35

1.2 Environment variables

Install 2.7 and then install 3.5 is like 3.5 will replace the original 2.7 added to path, so you have to manually add 2.7.

　　

1.3 Renaming

Before use, go to C:\Python27 to change Python.exe,pythonw.exe to python2.exe,pythonw2.exe

　　To C:\Users\Administrator\AppData\Local\Programs\Python\Python35 Python.exe,pythonw.exe instead Python3.exe,pythonw3.exe

1.4 cmd into the corresponding interactive interface

After changing the name, it is convenient to distinguish the start.

　　

1.5 py file specifies version run 1.5.1 cmd command line Interactive

　　　　　　

1.5.2 Sublime The specified version runs

Open untitled.sublime-build edit by Arrow order first

　　　　　　

Two operations, write the following code (change the CMD command and path according to your actual path and Python name, note that the path is '\ \'

# Python2

#Python2{ "cmd":["Python2.exe","- u","$file"], "Path":"c:\\python27", "File_regex":"^[]*file \ "(... *?) \ ", line ([0-9]*)", "selector":"Source.python"}

# Python3

#Python3{ "cmd":["Python3.exe","- u","$file"], "Path":"c:\\users\\administrator\\appdata\\local\\programs\\python\\python35", "File_regex":"^[]*file \ "(... *?) \ ", line ([0-9]*)", "selector":"Source.python"}

Note that the storage path (according to your actual situation):C:\Users\Administrator\AppData\Roaming\Sublime Text 3\packages\user

Then, when running with Ctrl+b, select the appropriate version in the Tools-build system

If I'm going to run with Python2, I'll choose.

　　　　　　

2. Use of PIP 2.1 mounting module

# Python2

Python2-m pip Install module name

# Python3

Python3-m pip Install module name

2.2 Viewing versions

# Python2

Python2-m Pip--version#pip 9.0.1 from C:\Python27\lib\site-packages (Python 2.7)

# Python3

Python3-m Pip--version#pip 8.1.1 from C:\Users\Administrator\AppData\Local\Programs\Python\ Python35\lib\site-packages (Python 3.5)

2.3 View Library List

# Python2

python2-m PIP List

# Python3

python3-m PIP List

Python2 when viewing the list, when prompted as follows:

Deprecation:the default format would switch to columns in the future. You can use--format= (legacy|columns) (or define a format= (Legacy|columns) in your pip.conf under the [list] sections) to D Isable this warning.

　　workaround : Create your own%appdata%\pip\pip.ini file and add the following file contents:

[List]format=columns

　Note:%appdata% can be run, input, enter into

The list is changed from left to right.

Python2.7 and 3.5 dual version coexistence and PIP usage