1 mean in python - 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.geeksforgeeks.org/python-statistics-mean-function/

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statistics mean() function – Python | GeeksforGeeks

The mean() function from Python’s statistics module is used to calculate the average of a set of numeric values. It adds up all the values in a list and divides the total by the number of elements. For example, if we have a list [2, 4, 6, 8], the mean would be (2 + 4 + 6 + 8) / 4 = 5.0.

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?

Here's the syntax to create an array in Python: As the array data type is not built into Python by default, you have to import it from the array module. We import this module as arr. Using the array method of arr, we can create an array by specifying a typecode (data type of the values) and the values stored in the array.

https://www.guru99.com/1-in-python.html

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1] in Python with Examples - Guru99

Whenever a programmer defines [::-1], it suggests that the program has to traverse from start to end in a given list. You can do indexing in python, which helps to slice and dice an iterable sequence such as a list or string. What is [::-1] in Python? What is the type of 1 in Python? How to perform Indexing in Python?

https://www.askpython.com/python/examples/plus-equal-operator

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The += Operator In Python - A Complete Guide - AskPython

In this lesson, we will look at the += operator in Python and see how it works with several simple examples. The operator ‘+=’ is a shorthand for the addition assignment operator. It adds two values and assigns the sum to a variable (left operand). Let’s look at three instances to have a better idea of how this operator works. 1.

https://stackoverflow.com/questions/22832615/what-do-and-mean-in-...

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syntax - What do >> and << mean in Python? - Stack Overflow

Perhaps an example would help, type a series of these in Python: print bin(1), print bin(1 << 1), print bin(17), print bin(17 >> 1) and so on. You can see how it works without explanations. It is an answer to the context the OP provided (and thus known to OP) and not to the question asked.

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:

https://statisticsglobe.com/calculate-mean-python

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Calculate Mean in Python (5 Examples) | Get Average of List & DataFrame

In this tutorial, I’ll demonstrate how to compute the mean of a list and the columns of a pandas DataFrame in Python programming. The content of the article is structured as follows: If you want to learn more about these contents, keep reading: This example illustrates how to get the average of the values in a list object.

https://stackoverflow.com/questions/14419206/what-does-1-mean-in-...

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syntax - What does :-1 mean in python? - Stack Overflow

It is list indexing, it returns all elements [:] except the last one -1. Similar question here. For example, It works like this. It's called slicing, and it returns everything of message but the last element. Best way to understand this is with example: You can always replace -1 with any number: The last index is not included. It's called slicing.

https://www.sololearn.com/en/discuss/1838639/python-string-questi...

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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. Let's break down how it works: - The first colon `:` indicates that we want to slice the entire string. - The second colon `:` indicates the step value.

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