In Part II, we study Python's
built-in core data types, sometimes called object types. Although
there are more kinds of objects in Python than we will meet in this
part, the types discussed here are generally considered the core data
types—the main subjects of almost every Python script
you're likely to read or write.
This part of the book is organized around major core types, but watch
for related topics, such as dynamic typing and general object
categories, to also appear along the way. Because chapters in this
part lay the groundwork assumed by later chapters, this part will
work best if read in a linear fashion.