Python Crash Course

Welcome to the Python Crash Course on the New Boston channel. This tutorial will cover a wide range of topics including syntax, variables, data types, numbers, strings, booleans, operators, loops, functions, classes, and objects.

Comments

• Used to explain code or make it more readable
• Start with a #
• Can prevent code execution
• Single line or multi-line (triple quotes)

Variables

• Created by assigning values
• Types: numbers, strings, etc.
• Type can be changed using casting (e.g., str(10), int('3'), float(3))

Data Types

• Strings: Single or double quotes, immutable, accessed by indices
• Integers & Floats: Whole numbers vs. decimal numbers
• Booleans: True or False
• Use type() to check data type
• Lists: Ordered, changeable, allow duplicates, defined with square brackets
• Tuples: Ordered, unchangeable, allow duplicates, defined with round brackets
• Sets: Unordered, unique items, defined with curly braces
• Dictionaries: Key-value pairs, unordered, changeable, keys must be unique, defined with curly braces

Operators

• Arithmetic: +, -, *, /, %
• Assignment: +=, -=, *=, /=, %=, etc.
• Comparison: ==, !=, >, <, >=, <=

Conditional Statements

• if, elif, else
• Indentation is crucial
• Boolean context for conditions

Loops

• While loops: Repeat as long as a condition is true
• For loops: Iterates over a sequence
• Break & Continue
• Else with loops

Functions

• Defined using def keyword
• Can take parameters and return values
• Syntax: def functionName(parameters):

Classes & Objects

• Python is object-oriented
• Define classes using class keyword
• Objects are instances of classes

Conclusion

• Encouragement to subscribe and interact
• Offered to provide more comprehensive tutorials if desired