--- title: I’m Learning in Public Again! Day 6: My First Look at NumPy description: A beginner's first hands-on exploration of NumPy, covering why it outperforms Python lists in memory efficiency (roughly 3x less) and speed (7x faster for... canonical: https://daily.dev/posts/i-m-learning-in-public-again-day-6-my-first-look-at-numpy-dkxwhwslb twitter:card: summary_large_image twitter:site: @dailydotdev og:type: website og:site_name: daily.dev og:title: I’m Learning in Public Again! Day 6: My First Look at NumPy | daily.dev og:description: A beginner's first hands-on exploration of NumPy, covering why it outperforms Python lists in memory efficiency (roughly 3x less) and speed (7x faster for... og:url: https://daily.dev/posts/i-m-learning-in-public-again-day-6-my-first-look-at-numpy-dkxwhwslb og:image: https://api.daily.dev/og/posts/dKXwhwSLB.png og:image:alt: I’m Learning in Public Again! Day 6: My First Look at NumPy og:image:width: 1200 og:image:height: 630 og:locale: en --- > ## Documentation Index > Fetch the complete documentation index at: https://daily.dev/llms.txt > Use this file to discover all available pages before exploring further. # I’m Learning in Public Again! Day 6: My First Look at NumPy **[Medium](https://daily.dev/sources/medium_js)** · 6 min read · 0 upvotes · 0 comments ## Summary A beginner's first hands-on exploration of NumPy, covering why it outperforms Python lists in memory efficiency (roughly 3x less) and speed (7x faster for element-wise math). Topics include array creation, 1D vs 2D arrays, indexing, dtype, shape, sorting, reshaping, aggregate functions (sum with axis), and built-in math functions like sqrt and std. Also briefly explains the __name__ == '__main__' pattern for structuring reusable Python scripts. ## Full article daily.dev links to this article rather than hosting it. Read it at the original source: ## Similar posts on daily.dev - [NumPy Tutorial: Your First Steps Into Data Science in Python Quiz – Real Python](https://daily.dev/posts/numpy-tutorial-your-first-steps-into-data-science-in-python-quiz-real-python-msyofbi3z) · Real Python · 2 upvotes · 1 comments - [Python Numbers Every Programmer Should Know](https://daily.dev/posts/python-numbers-every-programmer-should-know-dbwyosyik) · Planet Python · 4 upvotes · 0 comments - [NumPy for Absolute Beginners: A Project-Based Approach to Data Analysis](https://daily.dev/posts/numpy-for-absolute-beginners-a-project-based-approach-to-data-analysis-kco2cbwm6) · Towards Data Science · 0 upvotes · 0 comments --- Tags: [#python](https://daily.dev/tags/python), [#data-science](https://daily.dev/tags/data-science), [#numpy](https://daily.dev/tags/numpy) [View this post on daily.dev](https://daily.dev/posts/i-m-learning-in-public-again-day-6-my-first-look-at-numpy-dkxwhwslb) ```json {"@context":"https://schema.org","@graph":[{"@type":"Organization","@id":"https://daily.dev/#organization","name":"daily.dev","url":"https://daily.dev","logo":{"@type":"ImageObject","url":"https://daily.dev/apple-touch-icon.png","width":180,"height":180},"sameAs":["https://twitter.com/dailydotdev","https://github.com/dailydotdev","https://www.linkedin.com/company/daily-dev-ltd"]},{"@type":"WebSite","@id":"https://daily.dev/#website","url":"https://daily.dev","name":"daily.dev","publisher":{"@id":"https://daily.dev/#organization"},"potentialAction":{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https://daily.dev/search?q={search_term_string}"},"query-input":"required name=search_term_string"}}]} {"@context":"https://schema.org","@type":"TechArticle","headline":"I’m Learning in Public Again! 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