But Python itself can't cover absolutely every problem that can arise. That's why there are many packages/modules written. As a data analyst, you will need to learn several packages for manipulating and visualizing data.

To import a specific library (library_name) use import library_name. If you need only specific object from this library, you can specify it as follows: from library_name import function. Most likely you will use methods/attributes from imported library/function, so writing full library'/function' name is not convenient. You can set an alias while importing by adding as alias in the end. For instance, from datetime import time as t.