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Python for Everybody (Audio/PY4E)

Python for Everybody (Audio/PY4E)

These are the audio lectures to supplement the textbook 'Python for Everybody: Exploring Information' and its associated web site www.py4e.com. There is also a video podcast of this material.

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py4e.com

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1.1 Why Program

Explore the nature of programming and how programming a computer is different than using a computer.
2016-10-01
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1.2 Hardware Architecture

In this lecture we learn abut how the computer processes and stores programs. We learn about the CPU, Memory, Storage and Input / Output devices are brought together to write a program.
2016-10-01
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1.3 Python as a Language

We look at how writing programs is just another form of communication. Instead of communicating with another person, we are communicating our ideas to a computer.
2016-10-01
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1.4 What do we Say to Python?

We look at the basics of the Python language and how we write code in Python to communicate sequential steps, conditional steps and repeated steps.
2016-10-01
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2.1 Building Blocks of Python

We look at Python's reserved words, how we name and use variables, why we choose meaningful (mnemonic) variable names and how assignment statements function.
2016-10-01
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2.2 Expressions

We look at how we use various numerical and string operations to compute new information and store the new values in variables.
2016-10-01
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3.1 If-Then-Else

The most basic conditional structure is the if statement where we either execute or skip a segment of code based on the results of a logical expression (i.e. asking a question).
2016-09-30
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3.2 More Conditional Statements

In this lecture we look at multi-branch if statements and the try-except concept where we can indicate a group of statements to be executed if something goes wrong with a block of statements.
2016-09-30
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4.1 Using Pre-Defined Functions

We look at how code flows into and out of functions as well has how we pass information into functions and get results returned to us.
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4.2 Building our Own Functions

We look at how to build our own functions using parameters and arguments as well as how we return results to the code that is calling our functions.
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5.1 The Basics of Loops

We look at how we construct a loop so that it runs as long as we want it to run. We learn about iteration variables and exiting loops with the 'break' and 'continue' statements.
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5.2 Definite Loops

We learn how to use the 'for' statement in Python to loop through a set of data.
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5.3 Patterns for Making Loops

Loops have a beginning, middle, and end. We look ant how we construct a loop to look at a list of items one at a time so we can compute an overall maximum, minimum or average.
2016-09-30
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5.4 Loop Techniques

We continue to look at how to construct loops including how to do something special the first time through the loop. We introduce the idea of 'None' which is a way to indicate that a variable is currently empty.
2016-09-30
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6.1 Storing Text Data in Strings

We learn how to create string variables and extract portions of the data as well as write simple loops to read through the characters in a string.
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6.2 String Operations

We learn how to extract substrings using slicing, and use the string library to perform common data extraction operations with strings.
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7.1 Reading Files

We look at how text and lines are represented in files, how we open a file and write a loop to read through all the lines in the file.
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7.2 Processing Data in Files

We look at patterns for reading and processing the data in files. We learn how to check for nonexistent files, and how we process each line within the file.
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8.1 Creating and Using Lists

We learn how to put data into lists, take data out of the list and write simple loops to examine the elements of a list.
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8.2 Manipulating Lists

We learn about list slicing, list searching, and using pre-defined functions with lists.
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8.3 Strings and Lists

We learn how to parse strings pull sub-strings out of a string using the split() function.
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9.1 Python Dictionaries

We compare and contrast how Python lists and dictionaries are structured internally. How we use position to index lists and use keys to index dictionaries.
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9.2 Building Histograms

We look at how we can use dictionaries to count the frequencies of many things at the same time. We learn how the key and value are related in a dictionary and example the get method to retrieve values from a Python dictionary.
2016-09-30
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9.3 Counting Words in Text

In this segment we bring everything together, reading a file, parsing the lines, and computing the frequencies of the words in the file. This is an important moment that pulls from everything we have learned so far.
2016-09-30
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10.1 Understanding Tuples

We look at the basic syntax and capabilities of Python tuples. We explore the concept of immutability, and we compare tuples to lists and strings.
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10.2 Sorting Data

We look at how we sort lists, dictionaries, and lists of tuples in Python.
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Worked Example: Sorting Dictionaries

Worked Example: Sorting Dictionaries
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11.1 Introduction to Regular Expressions

We look at the syntax of regular expressions and how to use them to search through text data.
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11.2 Matching and Extracting Data

In this segment we learn to pull out data from strings after a regular expression has found a match.
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11.3 String Parsing with Regular Expressions

We look at how some of the string parsing we have done in earlier chapters can be easily done with regular expressions.
2016-09-30
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12.1 Network Technology (TCP/IP)

We take a very brief look at how software communicates across the Internet using TCP/IP.
2016-09-29
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12.2 Hypertext Transport Protocol (HTTP)

In this section we look at the HTTP protocol that is used to move documents between web servers and web browsers.
2016-09-29
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12.3 Building a Web Browser in Python

We write a simple Python program that connects to a web server and retrieves a web document. It is a very simple web browser.
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12.4 Unicode Characters and Strings

We explore how characters are encoded when they are transported across the network.
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12.5 Retrieving Web Pages

We write an even simpler Python program to retrieve a web page using the urllib library in Python.
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12.6 Parsing Web Pages

Now we will look at the HypertextMarkup Language (HTML) that we retrieved using Python and extract links from that HTML. We are slowly building a very simple web search engine.
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13.1 Data on the Web

We look at two different ways to format data for transmission across the network including JavaScript Object Notation (JSON) and eXtended Markup Language (XML).
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13.2 eXtensible Markup Language (XML)

We look at how data is represented using the XML format.
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13.3 XML Schema

We look at how we can use XML Schema to determine whether or not a particular bit of XML is valid.
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13.4 JavaScript Object Notation

We learn about the popular JSON data format and how to handle the JSON data in Python.
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13.5 Service Oriented Approach (SOA)

We talk briefly about how applications can be built over time to depend on services provide other applications.
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13.6 Using Application Programming Interfaces

We explore using a Google API that can be used to query location data and parse the JSON that is returned.
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13.7 Securing API Requests

We explore the use of OAuth to communicate sign requests to establish identity when using the Twitter API.
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14.1 Object Oriented Definitions and Terminology

We look at how Python mentions objects in its documentation as well as talk about why philosophy of object-oriented programming. We explore some OOP terms like class, object, instance, method, and attribute.
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14.2 Our First Class and Object

We look at how use create a new class in Python and then construct a new object from that class. We also look at some of the Python objects (like strings) that we have been using all along.
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14.3 Object Life Cycle

We look at how we as the developers of a Python class can interact with the moment of construction and destruction of various objects created using the class.
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14.4 Object Inheritance

We look at how we can make a new class by inheriting all of the attributes and methods of a parent class and then extend the new class with additional attributes and methods.
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15.1 Relational Databases

We look at the history of database systems, learn the terminology of database systems, and review some of the common database systems that are in use.
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15.2 Single Table SQL

We learn about how we can use Structured Query Language (SQL) to insert (create), read, update, and delete data in a single database table.
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15.3 Building a Relational Model

We look at how we can take the various data elements that will be modeled in an application and distribute them across several tables efficiently. We learn about the basic rules of database design.
2016-09-29
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En liten tjänst av I'm With Friends. Finns även på engelska.
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