Wednesday 10/11

PA1 A Debrief…

Files and File I/O

• Two basic types of files:
  • Text - We'll mostly deal with these.
    • Standard file format for storing text, most commonly UTF-8, which is an extension of ASCII.
    • Each 8-bit sequence corresponds to a single letter.
    • chr() and ord() built-in functions
    • ord("a") -> 97
    • f"{ord('a'):b}" -> 110001
    • chr(97) -> 'a'
  • Binary - Most files you typically interact with.
    • Format is specific to the application: images, audio, formatted documents etc.
• File I/O
  • open() function
  • File objects
• The file system
  • What is a path?
  • pathlib module
  • Example pathlib code

Quiz Instructions

• Log into the desktop as student with no password.
• Log into Canvas.
• Wait until the instructor says to start before accessing Part 1.
• The quiz can be found in the "Modules" section of Canvas.
• The entire quiz has a 25 minute time limit.
• Part 1 (Conceptual):
  • You may not use Thonny (or any other resources) for Part 1.
• Part 2 (Coding):
  • You have unlimited submissions.
  • You do NOT need to provide docstrings.
  • The autograder will NOT check for PEP8 violations (though you should still use good style.)
  • You must use Thonny as your editor.
  • You may not access any external web pages or other resources.