What does [:-1] mean/do in python? - Stack Overflow

>>> ''[:-1] '' This works on any sequence, not just strings. For lines in a text file, I’d actually use line.rstrip('\n') to only remove a newline; sometimes the last line in the file doesn’t end in a newline character and using slicing then removes whatever other character is last on that line.

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Python Operators - W3Schools

Sets each bit to 1 if both bits are 1: x & y: Try it » | OR: Sets each bit to 1 if one of two bits is 1: x | y: Try it » ^ XOR: Sets each bit to 1 if only one of two bits is 1: x ^ y: Try it » ~ NOT: Inverts all the bits ~x: Try it » << Zero fill left shift: Shift left by pushing zeros in from the right and let the leftmost bits fall off: x ...

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Python Slicing – How to Slice an Array and What Does [::-1] Mean?

When you specify a start and end index of 1 and 5, respectively, slicing will select values at index 1, index 2 (1 increment to the previous index), index 3 (1 increment to the previous index) and index 4 (and one increment to the previous index). In this slicing, a step of 1 is used by default. But you can provide a different step.

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Modulo operator (%) in Python - GeeksforGeeks

Modulo operator (%) in Python gives the remainder when one number is divided by another. Python allows both integers and floats as operands, unlike some other languages. It follows the Euclidean division rule, meaning the remainder always has the same sign as the divisor. It is used in finding even/odd numbers, cyclic patterns, and ...

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Negative Indexing in Python List – How to Use “-1” Parameter

A Python list can have many elements, and refer to a particular element among hundreds of elements present in them, indexing is used. Indexing in Python is a way to refer to individual items by their position within a list. In Python, objects are “zero-indexed”, which means that position counting starts at zero, 5 elements exist in the list, then the first element (i.e. the leftmost ...

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Operators and Expressions in Python

That evaluates to 1, which is truthy. At that point, Python stops the evaluation because it already knows that the entire expression is truthy. Consequently, Python returns 1 as the value of the expression and never evaluates the remaining operands, f(2) and f(3). You can confirm from the output that the f(2) and f(3) calls don’t occur.

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Python Operators (With Examples) - Programiz

Here, 'H' is in message, but 'hello' is not present in message (remember, Python is case-sensitive). Similarly, 1 is key, and 'a' is the value in dictionary dict1. Hence, 'a' in y returns False. Also Read: Precedence and Associativity of operators in Python; Python Operator Overloading; Table of Contents

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Python Operators - GeeksforGeeks

Python Tutorial – Python is one of the most popular programming languages. It’s simple to use, packed with features and supported by a wide range of libraries and frameworks. Its clean syntax makes it beginner-friendly.Python is:A high-level language, used in web development, data science, automatio

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What does the “at” (@) symbol do in Python? - Stack Overflow

Decorators were added in Python to make function and method wrapping (a function that receives a function and returns an enhanced one) easier to read and understand. The original use case was to be able to define the methods as class methods or static methods on the head of their definition.

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The Python Tutorial — Python 3.13.3 documentation

The Python interpreter is easily extended with new functions and data types implemented in C or C++ (or other languages callable from C). Python is also suitable as an extension language for customizable applications. This tutorial introduces the reader informally to the basic concepts and features of the Python language and system.

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