Python Programming for Beginners

Learn how variables act as placeholders in Python, enabling easy data changes without hard coding. Explore integers, strings, operations, and naming rules like underscores for leading numbers.

Learn how the while loop in Python repeatedly executes code while a condition holds, using condition plus equals one to progress and recognizing infinite loops that require breaking the script.

Explore how the for loop iterates over lists and ranges, compare it with while loops, and note how range ends before the end value and generates a generator.

Explore how the Python if statement executes code when a condition is true, using comparison operators like <, >, <=, >=, and ==, and avoiding = vs ==.

Explore how the else statement adds a second path to an if condition, executing when the condition is false. Note that else applies to the immediately preceding if.

Master Python control flow with if, elif, and else to build contingent logic across multiple variables. Use and/or operators to assess conditions and ensure only one branch executes.

Define and call functions in Python to package code with parameters, using a unique name and indentation. Functions prevent repetition by encapsulating tasks like a moving average or spell checking.

Master function parameters in Python by turning inputs into adjustable values, and learn to use defaults and keyword arguments to manage many settings with clear, reusable code.

Explore global and local variables in Python, showing how global variables are accessible across the script while local variables stay within their function.

Learn to diagnose common Python errors, from typos and undefined names to indentation and syntax issues, and verify module availability and correct 64-bit versus 32-bit installations.

Explore writing to a file in Python, using write and append modes; understand overwriting vs appending, open creates files, and remember to close the file before reading.

Append text to a file without overwriting, using append mode, manage newlines, and read back to verify that data accumulates correctly.

Learn how to read from a file in Python 3 by opening in read mode, using read or readlines, and splitting content by newline.

Learn how classes work by building a simple calculator class named calc, with add, subtract, multiply, and divide methods, and see how to instantiate and call these operations.

Explore raw input in Python 3 and the statistics module to compute mean, median, mode, standard deviation, and variance, with Python 3 explained versus Python 2.7.

Learn the import syntax in Python, including importing modules, aliasing with as, selective from imports, and using from ... import * for functions like mean and standard deviation.

Learn how to create and use modules in Python by saving a script as a module, importing it in another script, and locating modules in local directories, lib, and site-packages.

Learn Python error handling with try and except, catch specific errors such as type error and name error, log exceptions, and let programs continue rather than crashing.

Explore lists and tuples in Python: tuples are immutable while lists are mutable, with sequence unpacking examples and list operations such as append, insert, remove, index, count, sort, and reverse.

Explore Python dictionaries, learning keys and values, mutability, and how to create, update, add, and remove entries with real examples like a grade book.

Wrap up the Python basics by constructing a simple grade-tracking program that uses dictionaries, lists, and functions to add or remove students, log in, and compute averages.