The document describes how in December 1989, the author was looking for a hobby programming project to work on over the Christmas holiday while his office was closed, and decided to write an interpreter for a new scripting language he had been thinking about called Python, choosing the name Python as a working title for the project in a slightly irreverent mood as he was a big fan of Monty Python.

1. “Over six years ago, in December 1989, I was looking for a "hobby"
programming project that would keep me occupied during the week
around Christmas. My office ... would be closed, but I had a home
computer, and not much else on my hands. I decided to write an
interpreter for the new scripting language I had been thinking about
lately: a descendant of ABC that would appeal to Unix/C hackers. I chose
Python as a working title for the project, being in a slightly irreverent
mood (and a big fan of Monty Python's Flying Circus).”

4. Data types
Basic types
Container types
Numbers
int float complex decimal
Strings
str raw bytes chr
bytearray
Sequences
List Tuple Set Dict
Bool NoneType
named
tuple
frozen
set
ordered
dict
Main types
Class
Instance
Function
Type
deque

8. L.E.G.B rule
L, Local — Names assigned in any way within a function (def or lambda)), and not declared global in that
function.
E, Enclosing-function locals — Name in the local scope of any and all statically enclosing functions
(def or lambda), from inner to outer.
G, Global (module) — Names assigned at the top-level of a module file, or by executing a globalstatement
in a def within the file.
B, Built-in (Python) — Names preassigned in the built-in names module : open,range,SyntaxError,...