Outline for February 13

Reading: text, §7
Due: Homework 3, due on February 15 at 11:55pm

1. Characters and representations
   1. How characters are represented internally [chr.py, ord.py]
   2. Figuring out the position of a character in the alphabet
2. Files
   1. What is a file?
   2. What can you do with it? (For example, read, write, append)
   3. Types of files (text, binary)
3. File Input and output for text files
   1. Opening and closing: open(filename, mode), close()
   2. Reading: readline(), readlines(), read(), read(n)
   3. Writing: write(str), writelines(list)
4. Examples
   1. Print out a named file [fileio1.py]
   2. Print out a named file and prepend line numbers [fileio2.py]
   3. Store the output in filename.lst [fileio3.py]
   4. Same, but use print rather than write [fileio4.py]
5. Examples
   1. Put lines in a file in random order [randlines.py]
   2. Read in a list of words from a file, then search it as requested; similar to linear search program [search-1.py]
   3. Now see how many words you checked total [search-1c.py]

Matt Bishop Office: 2209 Watershed Science Phone: +1 (530) 752-8060 Email: [email protected]

You can also obtain a PDF version of this. Version of February 11, 2019 at 8:10PM