What is “Filtering Comprehension”? “All” the “Three” Types of “Collection Comprehensions” “Support” an “Optional Filtering Clause”, i.e., “if” Clause. This “Clause” “Allows” to “Choose” “Which Items” of the “Source” are “Evaluated” by the “Expression” on the “Left Collection”. from math import sqrt def isPrimeNumber (inputNum): # If the "Input Number" is "Less Than 2"…

What is “Iteration”? A “Central Abstraction” in “Python” is the “Notion” of an “Iterable”, i.e., an “Object” from which it is possible to “Fetch” a “Sequence” of “Other Objects”. The “Act” of “Fetching” a “Sequence” from an “Iterable” is known as “Iteration”. “Iteration” is “Encountered” in the form of “Loops”, such as —…

Introduction to “Program Errors” Almost anything that “Goes Wrong” with a “Python Program” “Results” in an “Exception”. But, some, such as “IndentationError”, “SyntaxError”, and, “NameError” are the “Result” of the “Programmer’s Error”, which should be “Identified”, and, “Corrected” during “Development”, rather than “Handled At Runtime”. If the “print ()” Statement is “Removed” from the…

Why “Exception Handling” is “Required”? In most programs, there is a “Clear Notion” of the “Normal Path” through the “Code”. But, “Conditions” can “Arise” where the “Normal Path” “Can’t” be “Followed”. Example: if a program involves “Reading a File”, “Specified” by the “User”, it may actually happen that the “File” “Doesn’t Exist. “Conditions” like this…

“Algebra Operations” on “Set” in “Python” Perhaps, the most useful aspect of the “Set” Collection Data Type is the “Group of Powerful Set Algebra Operations”. The following different “Set Methods” are used to “Compute” the corresponding “Algebra Operations” on the “Sets” - 1. Set Union - The “Union Operation” is “Performed” through the “union ()” Method. 2. Set…

What is a “Set”? A “Python Set” Data Type is an “Un-Ordered Collection” of “Unique Elements”. The “Collection” in a “Python Set” are “Mutable”, i.e., “Elements” can be “Added”, or, “Removed” from a “Python Set”. “Each” of the “Elements” in a “Python Set” must be “Immutable”, like the “Keys” of a “Python Dictionary”. Why “Python Sets” are “Used”? A…

What is a “Dictionary”? A “Python Dictionary” “Maps” the “Keys” to the “Values”, and, in “Other Programming Languages”, knows as a “Map”, or, an “Associative Array”. Each of the “Key-Value Pair” in a “Python Dictionary” is “Called” an “Item”. How “Python Dictionaries” are “Created”? “Python Dictionaries” are “Created” using the “Curly Braces”, i.e., “{}”, “Containing” the “Key-Value Pairs”. “Each”…

What is a “Tuple”? “Python Tuples” are the “Immutable Sequences of Arbitrary Objects”. Once “Created”, the “Elements” within the “Python Tuples” “Cannot” be “Replaced” or “Removed”, and, “New Elements” “Cannot” be “Added” to the “Python Tuples”. How “Python Tuples” are “Created”? “Python Tuples” are “Delimited” by “Parentheses”, i.e., “()”. The “Items” within the “Tuples” are “Separated” by “Commas”, i.e…

What is a “Range”? A “Range” is a “Collection”, rather than a “Container”. A “Range” is a “Type” of “Sequence” that is used to “Represent” an “Arithmatic Progression” of “Integers”. How “Ranges” are “Created”? “Ranges” are “Created” by “Calling” the “range () Constructor”. There is “No Literal Form” to “Create” a “Range”. Most typically, when “Creating” a “Range”…