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https://stackoverflow.com/questions/15535205/what-does-1-mean-do-...

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

Sometimes -1 is used to express the end of an array of things. My guess is this means to read from beginning to the end of the line (but just a guess, hence not an official answer). I'm not sure it's a dup, because of that "in the context of…" part—which is the part that you and, especially, Pavel Anossov answered.

https://www.freecodecamp.org/news/python-slicing-how-to-slice-an-...

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

Slicing an array is the concept of cutting out – or slicing out – a part of the array. How do you do this in Python? I'll show you how in this article. If you like watching video content to supplement your reading, here's a video version of this article as well. What is an Array?

https://www.tutorialspoint.com/what-does-do-in-python

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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. For negative indexing, to display the 1st element to last element in steps of 1 in reverse order, we use the [::-1]. The [::-1] reverses the order. In a similar way, we can slice strings like this.

http://python-reference.readthedocs.io/en/latest/docs/operators/s...

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-= Subtraction Assignment — Python Reference (The Right Way) 0.1 ...

Subtracts a value from the variable and assigns the result to that variable. A -= B. Any valid object. According to coercion rules. #TODO. Equivalent to A = A - B. #TODO. © Copyright 2015, Jakub Przywóski. Revision 9a3b94e7. Built with Sphinx using a theme provided by Read the Docs.

https://www.w3schools.com/python/python_strings.asp

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Python Strings - W3Schools

Like many other popular programming languages, strings in Python are arrays of bytes representing unicode characters. However, Python does not have a character data type, a single character is simply a string with a length of 1. Square brackets can be used to access elements of the string.

https://realpython.com/python-operators-expressions/

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Operators and Expressions in Python

Python operators enable you to perform computations by combining objects and operators into expressions. Understanding Python operators is essential for manipulating data effectively.

https://www.geeksforgeeks.org/what-does-1-mean-in-numpy-reshape/

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What does -1 mean in numpy reshape? - GeeksforGeeks

When we are unaware of any dimension of the array then we are allowed to have only one "unknown" dimension. This represents that we do not have to specify any number for one of that dimensions in the reshape method. We pass -1 as the value for the unknown dimension, and NumPy will calculate this unknown.

https://stackoverflow.com/questions/41446833/what-is-the-differen...

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python - What is the difference between i = i + 1 and i += 1 in a 'for ...

The difference is that one modifies the data-structure itself (in-place operation) b += 1 while the other just reassigns the variable a = a + 1. Just for completeness: If x doesn't implement an __iadd__ method then the x += y statement is just a shorthand for x = x + y. This would be the case if x was something like an int.

https://stackoverflow.com/questions/28535392/what-does-n-1-means-...

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string - What does n [::-1] means in Python? - Stack Overflow

It means, "start at the end; count down to the beginning, stepping backwards one step at a time." The slice notation has three parts: start, stop, step: If the start and stop aren't specified, it means to go through the entire sequence:

https://pythonguides.com/conditional-statements-and-loops/

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Python Conditional Statements and Loops

Read all the tutorials related to the topic of Python Sets. Loops in Python. Loops allow you to execute a block of code multiple times. Python provides two main types of loops: for loops and while loops. For Loops. The for loop in Python is designed to iterate over a sequence (like a list, tuple, dictionary, set, or string):

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