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The Ultimate Guide to Slicing in Python

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The idea of slicing is simple. You carve out a subsequence from a sequence by defining the start and end indices. But while indexing retrieves only a single character, slicing retrieves a whole substring within an index range.
Use the bracket notation for slicing with the start and end position identifiers. For example, word[i:j] returns the substring starting from index i (included) and ending in index j (excluded). Forgetting that the end index is excluded is a common source of bugs.
Slicing Tutorial:
BONUS Booklet: Master Slicing, Once and For All
Become a better coder! Download the 5x Python Cheat Sheet Course (PDF). It’s free!
🐍 Cheating in Python? Of course! 🐍
Use the bracket notation for slicing with the start and end position identifiers. For example, word[i:j] returns the substring starting from index i (included) and ending in index j (excluded). Forgetting that the end index is excluded is a common source of bugs.
Slicing Tutorial:
BONUS Booklet: Master Slicing, Once and For All
Become a better coder! Download the 5x Python Cheat Sheet Course (PDF). It’s free!
🐍 Cheating in Python? Of course! 🐍