Group Anagrams - Leetcode 49 - Hashmaps & Sets (Python)

Master Data Structures & Algorithms for FREE at https://AlgoMap.io/ Code solutions in Python, Java, C++ and JS for this can be found at my GitHub repo here: https://github.com/gahogg/Leetcode-So... Complete DSA Pathway Zero to Hero:    • Data Structures & Algorithms in Python - T...   Please check my playlists for free DSA problem solutions:    • Fundamental DSA Theory      • Array & String Questions      • 2 Pointers Questions      • Sliding Window Questions      • Binary Search Questions      • Stack Questions      • Linked List Questions      • Tree Questions      • Heap Questions      • Recursive Backtracking Questions      • Graph Questions      • Dynamic Programming (DP) Questions   My Data Science & ML YouTube Playlist:    • Greg's Path to Become a Data Scientist in ...   Learn Python and Data Science FASTER at https://mlnow.ai :) Support the content:    / @greghogg   Follow me on Instagram:   / greghogg5   Connect with me on LinkedIn:   / greghogg   Follow me on TikTok:   / greghogg5   Coursera Plus: https://imp.i384100.net/P0E3J6 My Favorite Courses: Data Structures & Algorithms: UCalifornia San Diego DSA: https://imp.i384100.net/LP31oV Stanford Algorithms: https://imp.i384100.net/vNBoxd Python Data Structures: https://imp.i384100.net/NkZn47 Meta Coding Interview Prep: https://imp.i384100.net/Y96rBJ Python: UMichigan Python for Everybody: https://imp.i384100.net/QOLM73 Python Mastery from MLNOW.ai: https://mlnow.ai/course-material/python/ Google IT Automation w/ Python: https://imp.i384100.net/5g6Xyj Web Dev / Full Stack: Meta Front-End Developer: https://imp.i384100.net/q4Jemy IBM Full Stack Developer: https://imp.i384100.net/Gj9dMn Meta Back-End Developer: https://imp.i384100.net/xkW0r5 John Hopkins HTML, CSS & JS: https://imp.i384100.net/QyoRAA IBM DevOps: https://imp.i384100.net/kjd2r0 Cloud Development: AWS Fundamentals: https://imp.i384100.net/anqBjZ GCP Cloud Engineer: https://imp.i384100.net/g1jvqB Microsoft Azure Fundamentals: https://imp.i384100.net/EKm5O4 Game Development: Michigan State Unity Development: https://imp.i384100.net/6eOBnr UColorado C++ for Unreal Engine: https://www.coursera.org/specializati... SQL & Data Science: SQL by MLNOW.ai: https://mlnow.ai/course-material/sql/ Python for Data Science by MLNOW.ai: https://mlnow.ai/course-material/data... Google Data Analytics: https://imp.i384100.net/1rkWAR IBM Data Science: https://imp.i384100.net/P0ZRL6 IBM Data Engineer: https://imp.i384100.net/4PbZyZ Machine Learning & AI: ML Mastery at MLNOW.ai: https://mlnow.ai/course-material/ml/ ML w/ Andrew Ng: https://www.coursera.org/specializati... Deep Learning w/ Andrew Ng: https://imp.i384100.net/a1kjJj