Data Structures and Algorithms with Python | Free DSA with Python Course - DSA in Python - Understanding Deque in Python | append, popleft, appendleft, pop | Part 84 [Hindi]

🚀 Welcome to Part 84 of Code & Debug’s DSA in Python Course! In this lecture, we understand the deque class from Python’s collections module, which is a double-ended queue that allows insertion and deletion from both ends in O(1) time. It’s an essential tool for solving sliding window, BFS, and queue-based problems efficiently. 📚 What you’ll learn in this video: ✅ What is a deque and why it’s better than a list for certain operations ✅ deque vs list time complexity comparison ✅ Commonly used methods:  • append() – O(1)  • appendleft() – O(1)  • pop() – O(1)  • popleft() – O(1) ✅ Internal working of deque and use cases in DSA problems ✅ When to use deque in interview-level questions 💡 Why is this important? Deque is a powerful, built-in data structure that helps in optimizing problems that require efficient operations on both ends. It’s widely used in sliding window, LRU Cache, BFS, and Monotonic Queue problems. 👉 Link to solve the question: https://www.geeksforgeeks.org/problems/implement-stack-using-array/1 👉 In-Depth Article with Code & Explanations: https://codeanddebug.in/blog/implement-stack-using-array/ 👉 📄 Access the full YouTube DSA Playlist Sheet (All Questions in Order): 🔗 https://docs.google.com/spreadsheets/d/1AWE15Fy3wD2iqu2vjK_R7cCiuvSsjYQclcdZmHpF66o/edit?usp=sharing 👉 Enroll in this FREE DSA Python course here: 🔗 https://codeanddebug.in/course/master-dsa-with-leetcode 👉 Enroll for Self-Paced Advanced DSA course here: 🔗 https://codeanddebug.in/course/zero-to-hero-python-dsa 🙏 Thank you for supporting Code & Debug! Don’t forget to like, share, and subscribe to our channel. Hit the 🔔 bell icon to stay updated with our latest lectures. #Deque #PythonCollections #DSADeque #append #popleft #appendleft #PythonDSA #DSAPythonCourse #CodeAndDebug #DataStructures #CodingInterviews #Part84