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What does [:-1] mean/do in python? - Stack Overflow
Working on a python assignment and was curious as to what [:-1] means in the context of the following code: instructions = f.readline()[:-1] Have searched on here on S.O. and on Google but to no avail. Would love an explanation!
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1] in Python with Examples - Guru99
How to reverse a Python list using 1 in Python? The negative slicing and negative indexing can be applied to reverse a string or list in python. Let us take a string named “GURU99” to illustrate an example. Example. Python Code: b= "GURU99" print ("The list is", b) Substring=b[::-1] print (" The reverse of string GURU99 is", Substring) Output:
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string - What does n [::-1] means in Python? - Stack Overflow
This is explained nicely in Understanding slice notation, in the Python docs under "extended slicing", and in this blogpost: Python Slice Examples: Start, Stop and Step Share Improve this answer
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Python Slicing – How to Slice an Array and What Does [::-1] Mean?
Here, we specify a start of index 2, no end, and a step of -1. Slicing here will start from index 2 which is 3. The negative steps mean the next value in the slice will be at an index smaller than the previous index by 1. This means 2 - 1 which is 1 so the value at this index, which is 2 will be added to the slice.
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The += Operator In Python - A Complete Guide - AskPython
Congratulations! You just learned about the ‘+=’ operator in python and also learned about its various implementations. Liked the tutorial? In any case, I would recommend you to have a look at the tutorials mentioned below: The “in” and “not in” operators in Python; Python // operator – Floor Based Division; Python Not Equal operator
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What Does 'do' Do in Python - Online Tutorials Library
Slicing in Python gets a sub-string from a string. The slicing range is set as parameters i.e. start, stop and step. For slicing, the 1st index is 0.
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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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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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Python String question: What does [::-1] mean? - Sololearn
In Python, the syntax `[::-1]` is used to reverse a string. It is known as string slicing with a step value of -1. It is known as string slicing with a step value of -1. Let's break down how it works: - The first colon `:` indicates that we want to slice the entire string.
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1 Python: What is in 1 in Python? - Learn Coding Anywhere Anytime -PW ...
Define :- 1 Python. In Python, -1 is an integer literal representing the negative integer value of one. It is essentially the opposite of 1 and falls within the category of integer data types. Like other integers, -1 is immutable, meaning its value cannot be changed once assigned. Here’s a detailed breakdown of -1 in Python: