PyCharm includes all of the features of WebStorm because it's so common for Python developers to also do JS work, so you probably should just be using PyCharm.

PyCharm includes all of the features of WebStorm because it's so common for Python developers to also do JS work, so you probably should just be using PyCharm. That's what I do at my work. (It's also why PyCharm is more expensive than WebStorm.) If you find that WebStorm works better, you probably need to install the node.js plugin in PyCharm (which is free). It's included by default in WebStorm but not in PyCharm.