Graduate from Python (x, y) and try mixing different versions of Python @Windows

Python installation

download

Use the official distribution binaries at http://www.python.org/.

• Python 2.7.10 - Windows 32bit
• Python 2.7.10 - Windows 64bit
• Python 3.4.3 - Windows 32bit

64bit of 3.4 is omitted

Try PyPy from http://pypy.org/

• PyPy 2.6.0 Windows 32bit

Installation

CPython runs the installer normally. However, do not select "Add To PATH" for any version. PyPy expanded to C: \ PyPy26.

Install virtualenv

C:\>c:\python27\scripts\pip install virtualenv
You are using pip version 7.0.1, however version 7.1.0 is available.
You should consider upgrading via the 'pip install --upgrade pip' command.
Collecting virtualenv
  Downloading virtualenv-13.1.0-py2.py3-none-any.whl (1.7MB)
    100% |################################| 1.7MB 236kB/s eta 0:00:01
Installing collected packages: virtualenv
Successfully installed virtualenv-13.1.0

Use virtualenv

In the example, they are all named venv, but it may be better to use a descriptive name.

Python 2.7

C:\Users\kounoike\Documents\python\py27>venv\Scripts\activate.bat
(venv) C:\Users\kounoike\Documents\python\py27>python --version
Python 2.7.10

(venv) C:\Users\kounoike\Documents\python\py27>python
Python 2.7.10 (default, May 23 2015, 09:40:32) [MSC v.1500 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> quit()

Python 2.7-64bit

C:\Users\kounoike\Documents\python\py64>c:\python27\Scripts\virtualenv.exe -p c:\Python27_64\python.exe venv
Running virtualenv with interpreter c:\Python27_64\python.exe
New python executable in venv\Scripts\python.exe
Installing setuptools, pip, wheel...done.

C:\Users\kounoike\Documents\python\py64>venv\Scripts\activate.bat
(venv) C:\Users\kounoike\Documents\python\py64>python --version
Python 2.7.10

(venv) C:\Users\kounoike\Documents\python\py64>python
Python 2.7.10 (default, May 23 2015, 09:44:00) [MSC v.1500 64 bit (AMD64)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> quit()

Python 3.4

C:\Users\kounoike\Documents\python\py34>c:\Python27\Scripts\virtualenv.exe -p c:\Python34\python.exe venv
Running virtualenv with interpreter c:\Python34\python.exe
Using base prefix 'c:\\Python34'
New python executable in venv\Scripts\python.exe
Installing setuptools, pip, wheel...done.

C:\Users\kounoike\Documents\python\py34>venv\Scripts\activate.bat
(venv) C:\Users\kounoike\Documents\python\py34>python --version
Python 3.4.3

(venv) C:\Users\kounoike\Documents\python\py34>python
Python 3.4.3 (v3.4.3:9b73f1c3e601, Feb 24 2015, 22:43:06) [MSC v.1600 32 bit (Intel)] on win32
Type "help", "copyright", "credits" or "license" for more information.
>>> quit()

pypy

C:\Users\kounoike\Documents\python\pypy>c:\python27\Scripts\virtualenv.exe -p c:
\pypy26\pypy.exe venv
Running virtualenv with interpreter c:\pypy26\pypy.exe
New pypy executable in venv\bin\pypy.exe
Installing setuptools, pip, wheel...done.

C:\Users\kounoike\Documents\python\pypy>venv\bin\activate.bat
(venv) C:\Users\kounoike\Documents\python\pypy>where python
C:\Users\kounoike\Documents\python\pypy\venv\bin\python.exe

(venv) C:\Users\kounoike\Documents\python\pypy>python --version
Python 2.7.9 (295ee98b6928, May 31 2015, 14:07:43)
[PyPy 2.6.0 with MSC v.1500 32 bit]

Note that it is venv \ bin \ activate.bat

Use compile-required libraries such as numpy in binary packages

Use the binary packages of Unofficial Windows Binaries for Python Extension Packages.

Frequently used items

• numpy (used for matplotlib and pandas)
• pywin32 (used for PyInstaller)

I don't like direct URL links, so I'll download them and organize them in an easy-to-understand folder (although I put them directly under Downloads in the examples below).

In the case of PyPy, it seems that another troublesome procedure is required, so I will omit the library.