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Learn Python this summer Day 14: Web Scraping
Welcome back! Yesterday, we learned about creating graphical user interfaces (GUIs) with tkinter. Today, we’ll dive into web scraping, which allows you to extract data from websites using Python. By the end of this day, you’ll know how to scrape web data using libraries like requests and BeautifulSoup. Let’s get…
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Learn Python this summer Day 13: Graphical User Interfaces (GUIs)
Welcome back! Yesterday, we learned about inheritance and polymorphism in Python. Today, we’ll dive into graphical user interfaces (GUIs) and learn how to create simple GUIs using the tkinter library. By the end of this day, you’ll know how to build basic GUI applications. Let’s get started! What is tkinter?…
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Learn Python this summer Day 12: Inheritance and Polymorphism
Welcome back! Yesterday, we learned about classes and objects in Python. Today, we’ll dive deeper into object-oriented programming concepts with inheritance and polymorphism. These concepts will help you create more flexible and reusable code. Let’s get started! What is Inheritance? Inheritance allows you to create a new class based on…
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Learn Python this summer Day 11: Classes and Objects
Welcome back! Yesterday, we learned about dictionaries and sets in Python. Today, we’ll dive into classes and objects, which are the foundation of object-oriented programming (OOP). By the end of this day, you’ll know how to create and use classes and objects in Python. Let’s get started! What are Classes…
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Code Interview: Python for Coding Interviews
Python for Coding Interviews Variables Python is dynamically typed, meaning you don’t need to declare the type of a variable. Here’s how it works: n = 0 print(n) # Output: 0 n = "ABC" print(n) # Output: ABC Multiple Assignments You can assign multiple variables in one line: a, b…
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Code Interview: Data Structures for Coding Interviews
Data Structures for Coding Interviews Basic Data Structures Arrays Lists Tuples String Manipulation Strings String Methods Sets and Dictionaries Sets Dictionaries Linked Lists Singly Linked List Doubly Linked List Circular Linked List Stacks and Queues Stacks Queues Deques Trees Binary Trees Binary Search Trees AVL Trees Red-Black Trees N-ary Trees…
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Python 101: Sets
Python Sets https://www.w3schools.com/python/python_sets.asp In Python, a set is a collection of unique elements, and it is an unordered and unindexed collection of items. Set is one of 4 built-in data types in Python used to store collections of data, the other 3 are List, Tuple, and Dictionary, all with different…
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Learn Python this summer Day 10: Dictionaries and Sets
Welcome back! Yesterday, we learned about lists and list comprehensions in Python. Today, we’ll dive into dictionaries and sets, which are powerful data structures for storing and managing collections of data. By the end of this day, you’ll know how to create and use dictionaries and sets effectively. Let’s get…
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Algorithms 101: Non-Recursive Binary Tree Traversal
Non-Recursive Binary Tree Traversal by 砖家王二狗 In-order Traversal: In in-order traversal, we visit the left subtree, then the root, and finally the right subtree. Here’s a non-recursive example in Python: def in_order_traversal(root): result = [] stack = [] current = root while current or stack: while current: stack.append(current) current =…
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Algorithms 101: Tree Preorder Traversal Using Recursive and Iterative Methods
Tree Preorder Traversal in Recursive and Iterative Ways In the context of the provided search results, it seems that the term "preorder" is primarily associated with marketing strategies, product launches, and customer engagement. However, I believe you are referring to the preorder traversal technique used in tree data structures. Preorder…