You need to understand the fundamentals first, if you don't you'll make the journey longer and harder than it needs to be. Firecode.io is fantastic from moving from 0 knowledge to being able to solve Leetcode Easy/Easy-Mediums. It focuses on repeating questions so you actually understand how to solve them. Getting the activation code takes a while because it's in beta but you can just DM the founder and they might help you get it quicker(that's what i did). Depending on how much time you have, you might want to "complete" firecode or once you've reached a decent competency with it (Level 3 upwards maybe) you can move onto more material. I'd recommend this site https://www.techinterviewhandbook.org/best-practice-questions/ It's basically just (most of) the questions from Blind 75. But it's given a 5 week schedule and more structure. If you attempt a question for a good amount of time and are making no process. Go on youtube and type "neetcode" + the problem name and there's a fantastic dude who explains the problems, concepts and solutions(in python). I have a copy of cracking the coding interview as well, but for that I write down the code on a notebook like you're supposed to. So basically: Understand the Fundamentals of Data Structures & Algorithms Firecode.io to get comfortable solving simple problems Cracking the Coding Interview or Blind 75 link i posted Elements of Programming Interviews (if you need more I guess) Answer from Dokrzz_ on reddit.com
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Reddit
reddit.com › r/csmajors › best leetcode/interview book or resource?
r/csMajors on Reddit: Best Leetcode/Interview book or Resource?
February 19, 2022 -

I mainly use Python for Leetcode and am looking for suggestions for a book/resource to help with leetcode. Some of the options I came across are "Elements of Programming Interviews in Python" and "Cracking the Coding Interview". Which one of these is better if I'm using python and are there any other good resources?

Edit: To be clear, I've already accepted an offer which I'm very happy with. I'm therefore not in a rush and am not time constrained, I'm just looking for a resource I can use to study and perfect my DS&A skills, especially the more complex stuff.

Top answer
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You need to understand the fundamentals first, if you don't you'll make the journey longer and harder than it needs to be. Firecode.io is fantastic from moving from 0 knowledge to being able to solve Leetcode Easy/Easy-Mediums. It focuses on repeating questions so you actually understand how to solve them. Getting the activation code takes a while because it's in beta but you can just DM the founder and they might help you get it quicker(that's what i did). Depending on how much time you have, you might want to "complete" firecode or once you've reached a decent competency with it (Level 3 upwards maybe) you can move onto more material. I'd recommend this site https://www.techinterviewhandbook.org/best-practice-questions/ It's basically just (most of) the questions from Blind 75. But it's given a 5 week schedule and more structure. If you attempt a question for a good amount of time and are making no process. Go on youtube and type "neetcode" + the problem name and there's a fantastic dude who explains the problems, concepts and solutions(in python). I have a copy of cracking the coding interview as well, but for that I write down the code on a notebook like you're supposed to. So basically: Understand the Fundamentals of Data Structures & Algorithms Firecode.io to get comfortable solving simple problems Cracking the Coding Interview or Blind 75 link i posted Elements of Programming Interviews (if you need more I guess)
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I cannot answer your question but I can offer some advice. Practice. Leetcode problems are more about solving puzzle's than actual real life competent programming. That being said most of these puzzle's have a set pattern you can look for (i.e. if recursive look for dictionary use, if you need to find a max or min value think two pointers etc.) Recognizing these puzzles just take time and practice even if you have to read some solutions to get started. Read the solution, come back and try to program the new solution with your new found understanding, then try a new one on your own.
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GitHub
github.com › Chen-Cai-OSU › leetcode-book
GitHub - Chen-Cai-OSU/leetcode-book: Descriptions and python solutions to all leetcode problems in a single 1985-page pdf
Descriptions and python solutions to all leetcode problems in a single 1985-page pdf - Chen-Cai-OSU/leetcode-book
Starred by 55 users
Forked by 7 users
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Amazon
amazon.com › LeetCode-Python-Solutions-Ali-Anari-ebook › dp › B08H1SHN1Y
Amazon.com: LeetCode Python Solutions eBook : Anari, Ali: Kindle Store
Best Books of 2025 · Kindle Store · › · Kindle eBooks · › · Education & Teaching · › · Studying & Workbooks · › · Study Guides · Image not available for Color: To view this video download Flash Player · Read sample · by Ali Anari (Author) Format: Kindle Edition · Since free questions may be even mistakenly taken down by some companies, only solutions will be posted now. There are new LeetCode questions every week.
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LeetCode
leetcode.com › discuss › post › 224914 › best-books-to-learn-python
Best books to learn python - Discuss - LeetCode
Here is my list of best books to learn python. Some of them are free and some are paid. 1. How to Think Like a Computer Scientist (Free) 2. Learn Python 3 t
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Goodreads
goodreads.com › book › show › 221446594-essential-leetcode-for-interview-success
Essential LeetCode for Interview Success: Python Solutions to 200 Must-Know Problems by Zhen Wei | Goodreads
November 11, 2024 - These chapters % of the “Grind 75 (169) questions”100% of LeetCode’s “Top 100 Liked Questions”74% (107 out of 145) of LeetCode’s “Top Interview Questions”Chapter 21 includes 14 additional problems focused on concurrency.Together, these represent a substantial collection of essential LeetCode problems to prepare you thoroughly for upcoming coding interviews.Why Python?
Author   Zhen Wei
Pages   289
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Gitbooks
dxmahata.gitbooks.io › leetcode-python-solutions › content
Introduction · Leetcode Python Solutions
This book will contain my solutions in Python to the leetcode problems. Currently, I will just try to post the accepted solutions. The plan is to eventually include detailed explanations of each and every solution.
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Udemy
udemy.com › development
LeetCode in Python: Mastering Algorithms and Coding
November 1, 2022 - This course is for all those people who want to learn the data structure and algorithms concepts by pragmatically applying it on leetcode problems and solving it from the absolute beginner to the Intermediate level.
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Packt
packtpub.com › en-us › product › dsa-in-python-top-130-leetcode-problems-for-maang-9781806700097
DSA In Python + Top 130 Leetcode Problems for MAANG | Programming | Video
DSA In Python + Top 130 Leetcode Problems for MAANG
This course offers a comprehensive guide to mastering Data Structures and Algorithms (DSA) with Python, focusing on solving over 130 Leetcode problems often asked in MAANG interviews. Starting with the basics—arrays, linked lists, stacks, queues, and trees—you will progress to advanced topics like dynamic programming, graphs, and heaps. Each problem is tackled step by step through live coding sessions, allowing you to understand the thought process behind the solution. You’ll also learn how to analyze time and space complexity, an essential skill for optimizing solutions in coding interviews.
Price   $74.99
Find elsewhere
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Scribd
scribd.com › document › 420510657 › Leetcode-Python-Solutions
LeetCode Python Solutions Guide | PDF | Algorithms And Data Structures | Discrete Mathematics
Leetcode Python Solutions - Free download as PDF File (.pdf), Text File (.txt) or read online for free. The document contains the table of contents for a book on Leetcode solutions in Python.
Rating: 4.5 ​ - ​ 8 votes
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Reddit
reddit.com › r/datascience › planning to use these leetcode resources to practice python skills for interviews
r/datascience on Reddit: Planning to use these leetcode resources to practice Python skills for interviews
July 31, 2024 -

Hi, I am planning to further enhance my Python skills for interviews related to data science roles.

I was thinking of using Leetcode

Pandas library practice: https://leetcode.com/studyplan/30-days-of-pandas/

For Python programming, one of these:

  1. https://leetcode.com/studyplan/programming-skills/

  2. https://leetcode.com/studyplan/leetcode-75/

  3. https://leetcode.com/studyplan/top-interview-150/

The only thing is that I'm not sure if the above 3 links are relevant and if they are even asked for data science / ML interviews.

Should I go ahead with this or look at some other platform that is focused on data science preparation?

P.S: I live in Europe so looking at the European job market

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Those 3 links are relevant. Pandas is definitely relevant for quite a few jobs and may even be tested in some (not all) job interviews. Overall, having strong programming/DS&A skills is always beneficial for Data Science interviews. From what I hear from the people I met from Europe, the European job market can have varying interview styles much like the U.S. Some won't even test you. Some will give you a take home assignment. At large organizations and MAANG, they may test your Python skills through Leetcode or similar problems. So if your aim is for one of those, I'd invest some time into Leetcode preparation. At these companies, they may or may not test your Pandas skills. I would actually recommend that you can at least do (and genuinely understand all of the theory behind) all of the easy problems and some of the medium problems from Grind 75: https://www.techinterviewhandbook.org/grind75 Also, I would get comfortable with Pandas using that link you have. You can also apply during your study period. You may even see a problem you practiced the prior day on the day of your interview. If you pass the interview, bam! No more studying. If you fail, no worries! You now have more knowledge for future interviews. Best of luck; I believe in you!
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I don't know much, but from my understanding you could try focusing on the database problems on leetcode. They're related to SQL and data manipulation. Could save you from wasting your time learning how to solve stuff not really that useful to DS. Anyways, good luck!! P.S. pls help me get 10 upvotes so I can ask my own questions lol.
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SourceForge
sourceforge.net › projects › leetcode-book.mirror
LeetCode Book download | SourceForge.net
December 30, 2025 - Comprehensive study guide for coding interviews. LeetCode-Book is a comprehensive study guide for coding interviews that consolidates algorithm patterns, data-structure templates, and worked LeetCode solutions.
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Amazon
amazon.com › leetcode › s
Amazon.com: Leetcode
Kindle Books · Check each product page for other buying options. leetcode cookbook · data structures and algorithms · leetcode shirt · interview prep & coaching · tech interview handbook · leetcode python · Visit the help section or contact us · Go back to filtering menu ·
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GitHub
github.com › wuduhren › leetcode-python
GitHub - wuduhren/leetcode-python: Leetcode Python Solution and Explanation. Also a Guide to Prepare for Software Engineer Interview.
Leetcode Python Solution and Explanation. Also a Guide to Prepare for Software Engineer Interview. - wuduhren/leetcode-python
Starred by 1.5K users
Forked by 197 users
Languages   Python
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Google Play
play.google.com › store › apps › details
Leetcode Python - Apps on Google Play
Python solutions to over 1000 algorithm problems from Leetcode
Rating: 4.4 ​ - ​ 289 votes
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LeetCode
leetcode.com › problems › sort-an-array › discuss › 1540648 › python-quick-sort-similar-to-text-book-code
python quick sort (similar to text book code) - Sort an Array
Can you solve this real interview question? Sort an Array - Given an array of integers nums, sort the array in ascending order and return it. You must solve the problem without using any built-in functions in O(nlog(n)) time complexity and with the smallest space complexity possible.
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Medium
iorilan.medium.com › how-to-use-leetcode-to-learn-python-in-2-months-b34e155a7904
How to use Leetcode to learn python in 2 months | by LORY | Medium
February 12, 2023 - How to use Leetcode to learn python in 2 months And landed a python job within the 2nd month. As a developer, We are always picking up new languages. and sometimes we find it stressful to do so, too …
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Reddit
reddit.com › r/learnpython › best way to actually build my skills with leetcode?
r/learnpython on Reddit: Best way to actually build my skills with LeetCode?
December 19, 2023 -

I'm currently a Computer Science student with about a year of Python/ programming experience. I also work as an entry level data engineer in the semi-conductor industry.

At work, I can use any resource available, and I mostly use tools like Github Co-pilot, ChatGPT, etc. to get me a base to work with, then I can understand and edit from there. I realize this is obviously not a good practice, and that I need to develop my own fundamental understanding of Data Structures and Algorithms, so I've been dedicating an hour and a half per day to working through LeetCode problems to better enhance my understanding of object-oriented programming.

I'm having a hard time figuring out the best way to go about this. For example, I'm working on the 'Valid Parentheses' problem. I remember reading about this as an example when I took my first Data Structures and Algorithms course, but I can't remember which Data Structure was used. I want to start googling stuff, maybe pull up the book I read during that course, but I also don't want to give myself an easy way out. But then when I sit there trying to work through these problems, I can easily kill an hour, hour and a half just staring at the screen trying new ways to do it, and ultimately failing, until I then (I've set a 1-hour deadline) look at NeetCodes explanation. It's helpful, for sure, but I don't feel like I'm learning as much as I could.

Idk, I just so desperately want to be good at programming, and I feel like I can't find a good way to actually learn.

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YouTube
youtube.com › codemans practice videos
Learn Python | LeetCode Challenge - 1. Two-Sum - YouTube
🎓 Welcome back to our exciting series of programming challenge solutions! Today, we are unraveling the solution to the 'Two Sum' problem from LeetCode. This...
Published   May 30, 2023
Views   264