python what does 1 - PrivacyWall

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.

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

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Python Operators - W3Schools

Operators are used to perform operations on variables and values. In the example below, we use the + operator to add together two values: Python divides the operators in the following groups: Arithmetic operators are used with numeric values to perform common mathematical operations: Assignment operators are used to assign values to variables:

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://learnpython.com/blog/python-operators-cheat-sheet/

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Python Operators Cheat Sheet - LearnPython.com

In this cheat sheet, we will cover every one of Python’s operators: Arithmetic operators. Assignment operators. Comparison operators. Logical operators. Identity operators. Membership operators. Bitwise operators. Additionally, we will discuss operator precedence and its significance in Python.

https://embeddedinventor.com/pythons-equal-to-operator-meaning-an...

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

What is == in python? ‘==’ is an operator which is used to compare the equality of 2 objects in Python. The objects under comparison can be strings or integers or some special user-defined class. How to read “==” ? The “==” symbol is called “ is equal to ” or “ equal to ” for short and is used in many programming languages like C, C++, Python, etc.

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.

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