Spyder,switching between python 2 and 3

Kernels for Python2:

Call on pip version:

Python –m pip –version

Installing ipykernel using pip tools:

Python –m pip install ipykernel

Python –m ipykernel install –user

To create Python environment :

Conda create –n ipykernel_py2 python=2 ipykernel

Source activate ipykernel_py2

Python –m ipykernel install –user

Kernels for different environments:

If u want to have multi-Ipython kernels for different virtualenvs or conda environments, u will need to specify unique names for the kernelspecs.

https://stackoverflow.com/questions/33709391/using-multiple-python-engines-32bit-64bit-and-2-7-3-5/40045888