Python Code Examples

This site presents a comprehensive list of Python code examples, sorted by different programming concepts. It covers basic concepts, control structures, functions, lists, classes and objects, inheritance and polymorphism, file operations, data structures, sorting algorithms, mathematical functions, threads, exception handling, pyodbc, and datetime module. Each category has several code examples that illustrate a particular concept.

For instance, the category “Python Basics” has examples such as arithmetic operators, comments, data types, input/output, and string methods.

Similarly, the category “Control Structures in Python” has examples of if-else statements, loops, and ternary operators. The webpage also presents examples of more advanced concepts, such as creating and using classes, inheritance, file operations, and threads.

Overall, this list serves as a useful reference for programmers who want to learn Python or to improve their skills.

Python Basics

Arithmetic operators in Python
Basics
Bitoperators in Python
Comments in Python
Conversion Programs
Data types in Python
Dictionary (dict) methods in Python
Escape sequences – special characters
Hello world
How do I handle errors and debugging in Python?
How do I work with modules and packages in Python?
Input / output in Python
Operators in Python
Python Code Example: check password strength
Python Code Example: convert celsius to fahrenheit
Python Code Example: convert decimal to binary number
Python Code Example: convert decimal to hexadecimal number
Python Code Example: convert decimal to octal number
Python Code Example: convert specific datatype to int
Relational and logical operators in Python
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Control Structures in Python

Empty blocks (pass command)
If-else syntax
Loops syntax
Python Code Example: check if a number is positive or negative
Python Code Example: check leap year in if else statement
Python Code Example: christmas tree pattern
Python Code Example: double nested for-loop
Python Code Example: floyd’s triangle
Python Code Example: hourglass pattern
Python Code Example: if else statement on boolean expressions
Python Code Example: left arrow pattern
Python Code Example: multi-branches
Python Code Example: nested for-loop
Python Code Example: nested if-else statement
Python Code Example: pattern reverse
Python Code Example: right arrow pattern
Python Code Example: simple if-else statement
Python Code Example: simple pattern
Python Code Example: triangle pattern
Ternary operator

Functions in Python

Call functions
Definition and declaration
Function parameters
Instance, class and static methods
Passing objects to functions
Python Code Example: calculate cross sum (iterative and recursive)
Python Code Example: greatest common divisor (recursive)
Python Code Example: least common multiple
Python Code Example: passing list to method
Python Code Example: simple login
Python Code Example: tower of hanoi (recursive)
Python Code Example: volume and surface area of a ball
Python Code Example: volume and surface of a cube
Recursion

Lists in Python

append() – add an entry to the end of a list
clear() – delete all entries in list
copy() – copy list
count() – return the number of existing list entries (count)
extend() – add all list entries to another list
index() – search for element in list and return index
insert() – insert an list entry at the given index number
List methods
List syntax
pop() – delete list entry by index (pop)
Python Code Example: arithmetic functions on lists
Python Code Example: even numbers in a list
Python Code Example: find pairs with target sum
Python Code Example: join two lists
Python Code Example: length of a list
Python Code Example: list in reverse order
Python Code Example: odd numbers in a list
Python Code Example: prints out indices of all pairs of numbers
Python Code Example: smallest and largest number in array
remove() – delete a list entry by value
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Classes and Objects in Python

Class methods
Classes and objects syntax
Constructor
Destructor
Encapsulation via get and set methods
Python Code Example: area of ​​a rectangle
Python Code Example: bank account
Python Code Example: create items with counter
Python Code Example: Data abstraction – public, private, protected
Python Code Example: introduce a person
Python Code Example: vending machine
Python Code Example: volume of a cube
Static class attributes and methods

Inheritance and Polymorphism in Python

Class polymorphism
Function polymorphism
Hierarchical inheritance
Hybrid inheritance
Multilevel inheritance
Multiple inheritance
Polymorphism basics
Single inheritance

Fileoperations in Python

Close file
Open file
Python Fileoperations: check if file exists
Python Fileoperations: check if two files have the same content
Python Fileoperations: copy lines from one file to another
Python Fileoperations: copy the file name and content of 10 files in another
Python Fileoperations: read the file size and type of an image
Read from file
Rename and remove file
Write to file

Data Structures in Python

Binary search tree (in-order, pre-order, post-order)
Graphs
Queue data structure
Stack data structure

Sorting Algorithms in Python

Bubble sort algorithm
Counting sort algorithm
Cycle Sort algorithm
Insertion sort algorithm
Intro sort algorithm
Merge sort algorithm
Selection sort algorithm
Shell sort algorithm

Errors and Exception Handling in Python

AttributeError – invalid attribute reference
Catching multiple exceptions
Example 1: show error information
Exception chaining
Exception handling (try-except)
Exceptions
NameError – identifier is not found in the namespace
OverflowError – exceeds the maximum possible value
Overview standard exceptions
Raising exceptions
TypeError – invalid operation on data type
User-defined exceptions
ZeroDivisionError – division by zero

Mathematical Functions in Python

Arithmetic sequence
Basic mathematical functions
Exponential and logarithmic math functions
Fibonacci sequence
Geometric number sequence
Incremental sequence
Mathematical rounding
Prime number sequence
Square number sequence
Triangular number sequence
Trigonometric math functions

Threads in Python

Create new thread
Import a thread
Python Code Example: join threads
Python Code Example: start threads in correct order (join-Keyword)
Python Code Example: start threads randomly (start-Keyword)
Python Code Example: step by step execution of threads
Start thread
Thread functions

System Functions in Python

Create new directory
Get operating system name and type
Get system date
List files and sub-directories
More operating system functions
Remove existing directory
Rename directory or file
Shutdown / restart computer

pyodbc Module

Establish connection to SQL Server
MariaDB Database Connections
MySQL Database Connections
Running SQL Insert query in Python code
Running SQL Select query in Python code
Running SQL Update query in Python code
Running the Query in SQL from Python

datetime module

Calculate age in years and days
Calculation of remaining time until birthday
Calculation of time difference via timedelta obejct
Convert string to datetime object
Creating date objects
Creating time objects
Get current date (now)
Get current datetime, date and time
Set timezone via pytz module
Working with strings