Batch scripts for running mutiple versions of python together in Windows.

readme.txt

To run these batch scripts, first unzip your python2.7 and python3 binaries ins separate paths as given above. 
Save these batch scripts in you root path.
In my case C:\Users\IBM_ADMIN
Then when ever you need to switch python env
from cmd.exe command prompt:
Just do:
envpython2.bat 
your env is 2.7 now and pip and all associated libraries and scripts are called from this path C:\Users\IBM_ADMIN\rcs\python-2.7.9.
For python3
envpython3.bat 
your env is 3.6 now and pip and all associated libraries and scripts are called from this path C:\Users\IBM_ADMIN\rcs\Python35-32.

envpython2.bat

@echo off
REM "ftype /?" explains all of this assoc and ftype and PATHEXT usage
REM https://docs.python.org/2/using/windows.html for more info around the subject.

REM set PythonDIR to your python 2 or 3 install path; e.g. the folder with python.exe in it.

set PythonDIR=C:\Users\IBM_ADMIN\rcs\python-2.7.9
set PATH=%PythonDIR%;%PythonDIR%\Scripts;%PATH%
set PYTHONPATH=%PythonDIR%\Lib;%PythonDIR%\Lib\site-packages;%PythonDIR%\DLLs;
set PATHEXT=%PATHEXT%;.PY;.PYW
assoc .py=Python.File>NUL
assoc .pyw=PythonW.File>NUL
ftype Python.File="%PythonDIR%\python.exe" %%1 %%*>NUL
ftype PythonW.File="%PythonDIR%\pythonw.exe" %%1 %%*>NUL

envpython3.bat

@echo off
REM "ftype /?" explains all of this assoc and ftype and PATHEXT usage
REM https://docs.python.org/2/using/windows.html for more info around the subject.

REM set PythonDIR to your python 2 or 3 install path; e.g. the folder with python.exe in it.

set PythonDIR=C:\Users\IBM_ADMIN\rcs\Python35-32
set PATH=%PythonDIR%;%PythonDIR%\Scripts;%PATH%
set PYTHONPATH=%PythonDIR%\Lib;%PythonDIR%\Lib\site-packages;%PythonDIR%\DLLs;
set PATHEXT=%PATHEXT%;.PY;.PYW
assoc .py=Python.File>NUL
assoc .pyw=PythonW.File>NUL
ftype Python.File="%PythonDIR%\python.exe" %%1 %%*>NUL
ftype PythonW.File="%PythonDIR%\pythonw.exe" %%1 %%*>NUL