Outline for November 13, 2024

Reading: text, §2, 13
Due: Homework 3, due November 13, 2024

1. Reading a URL [geturl.py, geturl2.py, geturl3.py]
   1. Opening a URL
   2. Reading the page as a string
   3. The role of decode() [geturl-nd.py]
   4. Handling secure connections [geturl-ssl.py]

2. A program to print links in web pages [urlpat.py, urlpat2.py]

3. JSON [json-ex.py]
   1. What it is
   2. json.loads
   3. json.dumps

4. What is XML?
   1. Tree structure
   2. Elements, tags, attributes, attribute values
   3. Example: sample1.xml

5. Python and XML [basic-xml.py]
   1. xml.etree.ElementTree
   2. Parsing the tree from file input (ET.parse()), from a string (ET.fromstring())
   3. Referring to elements
   4. Accessing tag names, attributes
   5. Finding nodes in the tree
   6. Dumping, writing the tree
   7. Removing an element and its descendants
   8. Changing an element’s attribute
   9. Setting attributes

Matt Bishop Office: 2209 Watershed Sciences Phone: +1 (530) 752-8060 Email: mabishop@ucdavis.edu

ECS 235A, Computer and Information Security Version of November 12, 2024 at 7:17PM

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