CS 2000 - Fall 2026.

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Welcome to CS 2000! 9/16/2026

The Story of Python and how it took over the world | Python: The Documentary. Key points: mostly a bunch of nerdy white guys (now there are PyLadies but no MeToo's unlike GNU and Linux), Guido is actually pretty chill which is reflected in Python itself, civil war over Python 2 vs 3, bitterness over the walrus operator.

Robert Kahn.

Python: Trailer from Socratica

Python: Hello World from Socratica

Python: Strings from Socratica [Note: bad link in Strings lecture notes.]

Python: lists from Socratica.

Python: Numbers from Socratica

Python: lambda expressions from Socratica

Python: list comprehensions from Socratica

Logical problem of the day

There are only 10 types of people in the world: those who understand X and those who don't.

Solve for X.

https://pollev.com/slade You may also download the app to your phone. Use the "slade" poll id.

Canvas Quiz of the Day (need daily password)

Most days, there will be a simple canvas quiz related to the lecture. You need a password to activate the quiz, which I will provide in class. These quizzes will count toward your class participation grade. The quiz is available only during class.

Click for today's quiz.

Note: the collaboration quiz is separate. It coincides with the first homework assignment.

Lecture 4: Python.

Administrivia

  • I have office hours Wednesdays from 4 to 6 pm, on zoom, id 459 434 2854.

  • I will be available for lunch with students on Mondays at 1pm in the Morse College dining hall.

  • TA office hours are found at Ed Discussions on Canvas.

  • Epigrams in Programming, Alan Perlis.

  • Homework assignments: [Assignments]. hw2 is now available. See hw0a.pyc and hw1a.pyc. The name of your homework file submitted to gradescope must be exactly the same as the assignment file, e.g., hw0.py, hw1.py, hw2.py. Otherwise, zippo.

    Announcements

  • Poorvu STEM Navigators Program. Advice on internship interviews, talking to professors, usw.

  • Yale Digital Ethics Center You may have seen headlines about the coming AI apocalypse (FOBE). You can help save the world by working at the DEC. See McCane Student Fellows Deadline: October 19th.

  • Yale Information Society Project See this week's events.

  • Let us know if you have an upcoming event you would like to share with the class.

    Getting to know Python

    Lists.html (jupyter) Python

    Recursion.html (jupyter) recursion.py

    Listcomp.html (jupyter) List Comprehensions listcomp.py

    review hw1.

    Sorting.html (jupyter) Python - Sorting

    DictFiles.html (jupyter) Python - Dicts and FIles

    Everything is bits!

    Music and Computation, discusses the spectrum of binary encoding. It will be on the first midterm exam, except for the music part.

    Getting to know UNIX

    UNIX Introduction Principle 2. (Review os module UNIX commands.)

    Sample UNIX exam question. Specify the XXXX commands.

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