Python for Everybody (py4e.com)
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Python for Everybody (py4e.com)
These are the lectures to supplement the textbook 'Python for Everybody: Exploring Information' and its associated web site py4e.com
Recent Episodes
86 episodes
1.1 Why Program
Explore the nature of programming and how programming a computer is different than using a computer.
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...
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 t...
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.
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 fu...
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.
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 expressio...
3.2 More Conditional Statements
In this video 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...
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.
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.
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...
5.2 Definite Loops
We learn how to use the 'for' statement in Python to loop through a set of data.
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 ma...
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'...
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.
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.
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.
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 t...
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.
8.2 Manipulating Lists
We learn about list slicing, list searching, and using pre-defined functions with lists.
8.3 Strings and Lists
We learn how to parse strings pull sub-strings out of a string using the split() function.
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 diction...
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 dict...
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 i...
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.
10.2 Sorting Data
We look at how we sort lists, dictionaries, and lists of tuples in Python.
11.1 Introduction to Regular Expressions
We look at the syntax of regular expressions and how to use them to search through text data.