[dagw]

It really depends on what you want to do. Python wins big with a wide and varied ecosystem outside the basic web domain. Do things like computational science, data analysis, mathematical modelling, statistics, GIS etc. sound like something you might want to get into? If so python is a much better bet. If ,on the other hand, you're happy in the web services domain where node has its main strengths, then node.js vs python pretty much works out to a draw and there is not too much reason to switch.