This document provides instructions for installing Python and common Python libraries on Windows. It recommends downloading the Python installer, checking the option to add Python to the PATH, and then using pip to install libraries from .whl files downloaded from a specific URL. It describes adding the Python and Scripts directories to the system PATH variable for permanent use of pip and Python in the command prompt. Verification of successful installation is also covered.

1. Installing Python on
Windows OS
David Hsu

2. https://www.python.org/

3. Download the Python's installer for specific version
based on the operating system
e.g. For 64-bit Windows OS, download python-3.5.2-amd64.exe from
Windows x86-64 executable installer

4. Windows x86-64 executable installer
Make sure to check the option "Add Python 3.5 to PATH", or
there will be some inconveniences when using pip installation
in the command prompt.

5. WHEEL (.whl)

6. Download installation files (.whl) from
http://www.lfd.uci.edu/~gohlke/pythonlibs/
Many thanks to the team from UC-Irvine.
They make installations much easier for windows' users.

7. List of the installing libraries
Requests, the only Non-GMO HTTP library for Python.
Theano, a Python library that allows you to define, optimize, and evaluate mathematical
expressions involving multi-dimensional arrays efficiently.

8. Download the .whl files and save them under the same
folder, such as C:Usersuser_nameDownloads

9. 2. In the command prompt : change directory to the
folder that those .whl files have been saved to
1. Search "cmd" and open the command prompt
In the command prompt :
cd to_the_path

10. PIP
In the command prompt : pip install package_name.whl

11. In the command prompt :
pip install numpy-1.11.3+mkl-cp35-cp35m-win_amd64.whl

12. In the command prompt :
pip install scipy-0.18.1-cp35-cp35m-win_amd64.whl

13. In the command prompt :
pip install matplotlib-1.5.3-cp35-cp35m-win_amd64.whl

14. In the command prompt :
pip install scikit_learn-0.18.1-cp35-cp35m-win_amd64.whl

15. In the command prompt :
pip install tensorflow-0.12.1--cp35-cp35m-win_amd64.whl

16. In the command prompt :
pip install Theano-0.8.2-py2.py3-none-any.whl

17. In the command prompt :
pip install pygame-1.9.2-cp35-cp35m-win_amd64.whl

18. In the command prompt :
pip install requests-2.12.4-py2.py3-none-any.whl

19. * You need to have numpy installed first before you install opencv (cv2)
In the command prompt :
pip install opencv_python-3.2.0-cp35-cp35m-win_amd64.whl

20. To verify the modules have been installed successfully, try to
import each module and check its version like followings.

21. Congrats, you can start up your python code now!

22. Appendix
If the option "Add Python 3.5 to PATH" was not
checked while installing ...

23. then, in the command prompt, we can not execute
python nor use 'pip' for installations since they can
not be recognized by the system

24. [solution 1] Adding those paths to the system
environmental variable "PATH" temporarily
To show the current PATH value in the command prompt :
echo %PATH%
To append a new path to the PATH value in the command prompt :
set PATH=%PATH%;the_new_path
Then use echo %PATH% to print out the PATH value again to confirm
the new path has been added successfully by using set
PATH=%PATH%;the_new_path

25. To execute Python in the command prompt, the following path needs to
be added to system environment variables of PATH :
C:Usersuser_nameAppDataLocalProgramsPythonPython35

26. To use 'pip' to install python's libraries in the command prompt, the following
path needs to be added to system environment variables of PATH :
C:Usersuser_nameAppDataLocalProgramsPythonPython35Scripts

27. [solution 2] Adding those paths to the system
environmental variable "PATH" permanently
select System from Control Panel and click Advanced system settings

28. In System Properties, click the button "Environment Variables..."

29. Select Path and click the button "Edit", or just double click Path

30. In Edit User Variable, append the new paths in Variable value and use
semicolon ";" to separate each path, then keep clicking "OK" button to
complete the setting.
e.g. ;C:Usersuser_nameAppDataLocalProgramsPythonPython35;C:
Usersuser_nameAppDataLocalProgramsPythonPython35Scripts

31. In the command prompt, use echo %PATH% to check system
environment variables of PATH has been updated with those two
paths we need for python. And the commands of Python and pip
can be applied successfully.

32. Or reopen the Environment Variables window and double-click Path
to check those two paths for Python has been included

33. Remarks
1. The version of operating system (32-bit or 64-bit) on the device
can be found from
2. For windows XP, it is suggested to install Python 3.4.4 since
Python>=3.5 doesn't support windows XP.
3. For windows XP, download the .whl files with cp34 and win32 version
for libraries installations.
e.g. numpy-1.11.3+mkl-cp34-cp34m-win32.whl
4. If error occurs while installing, upgrade 'pip' first by using "pip install
--upgrade pip", and then try again "pip install package_name.whl".
5. For windows XP, the Python34 was installed under C: by default,
therefore, the following two paths need to be included to system
environment variables of PATH to use Python and pip in the command
prompt :
C:Python34;C:Python34Scripts

34. For Windows XP
-> List of installations
-> In the command prompt
-> Check installations
in Python 3.4.4 Shell

35. -> List of installations
-> In the command prompt
6. Python 3.6.0 is now distributed and the supported libraries are
also available from the website http://www.lfd.uci.edu/~gohlke/
pythonlibs/

36. -> Check installations in Python 3.6.0 Shell