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

Learn how to slice an array in Python using colons and square brackets. See examples of slicing with different start, end and step arguments.

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1] in Python with Examples - Guru99

Role of slicing in Python. In simpler words, a slice means to cut something. It allows dicing a list in python. Here, how slicing is important in Python: ... Example of 1 in Python. Slicing or indexing can be employed to extract a smaller list from a more extensive list. Similarly, it can be used to extract a substring from a larger ...

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What Does 'do' Do in Python - Online Tutorials Library

Discover the functionality and purpose of the 'do' statement in Python programming. Learn how it can be utilized effectively in your code. ... step] # slicing from 1st to last in steps of 1 in reverse order arr[::-1] Remember, negative number for step means "in reverse order". Let us now see examples ?

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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 Operators Cheat Sheet - LearnPython.com

Python Comparison Operators. Comparison operators are used to compare two values.They return a Boolean value (True or False) based on the comparison result.These operators are often used in conjunction with if/else statements in order to control the flow of a program. For example, the code block below allows the user to select an option from a menu:

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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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What Does :: Mean in Python? Operator Meaning for Double Colon

You can use the double colon (::) in Python to slice or extract elements in a collection such as a list or string. In this article, you'll learn the syntax and how to use :: to slice a list in Python. You'll also learn how to use the parameters associated with this method of slicing. Python Double Colon (::) Syntax

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Python’s “==” (double equal) Operator’s Meaning Explained Using Examples!

Okay, let us see what the above code does! we assigned the string “apple” to the variable str1 and the string “banana” to the string str2.; In line 3 above we are checking if variables str1 and str2 are equal and as expected the python interpreter prints out False.; In line 5 we have reassigned the variable str2 to “apple” and we are doing the same equality check once more.

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What does 'for x in A[1:]' mean in Python? - AskPython

Here, the ‘start’ value is 1 meaning the first element of the list is skipped in the slice. The ‘stop’ and ‘step’ values are omitted, meaning the slicing is done till the end of the list, and the step size is 1, which means no element is skipped in between. ... Also read: What is the meaning of “int(a[::-1])” in Python?

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