Here are a few of the top python libraries that I think every should know.

Numpy:

Numpy is a library that will help you do some complex maths with python and this is very useful when you are doing something like machine learning or data handling. You don't need to know everything about maths but it's a good idea to go through stuff like mean. Just for knowledge.

Matplotlib:

Matplotlib is a library that allows you to make and plot graphs and visualise things in a better way. This will is especially helpful when you are working with data.

Pandas:

Pandas is a library that allows you to work with csv and other types of data documents and just data in general. Pandas allows you to import other documents like a .csv file

Conclusion:

With this sweet of tool's you can do some very complex stuff, and if you add tensorflow with this tool set you can create and craft some amazing things. I didn't mention libraries like pygame or tensoflow, because they are meant for a topic; whereas these can be used in most if not all big applications.