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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.This function is useful when analyzing data and finding central tendencies.

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

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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!

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, 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.

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

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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:

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.

https://numpy.org/doc/stable/reference/generated/numpy.mean.html

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numpy.mean — NumPy v2.2 Manual

The arithmetic mean is the sum of the elements along the axis divided by the number of elements. Note that for floating-point input, the mean is computed using the same precision the input has. Depending on the input data, this can cause the results to be inaccurate, especially for float32 (see example below). Specifying a higher-precision accumulator using the dtype keyword can alleviate this issue.

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

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Python statistics.mean() Method - W3Schools

W3Schools offers free online tutorials, references and exercises in all the major languages of the web. Covering popular subjects like HTML, CSS, JavaScript, Python, SQL, Java, and many, many more.

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

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Calculate Mean in Python (5 Examples) - Statistics Globe

Example 1: Mean of List Object. This example illustrates how to get the average of the values in a list object. For this example, we first have to create an example list: ... As shown in Table 1, the previous Python programming syntax has constructed a pandas DataFrame containing three columns called x1, x2, and group. The columns x1 and x2 contain floats and the column group is a group indicator (more on that later). ...

https://stackoverflow.com/questions/31633635/what-is-the-meaning-...

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What is the meaning of "int(a[::-1])" in Python? - Stack Overflow

Now the indexing here and also the step count, support negative numbers. So, if you give a -1 index, it translates to len(a)-1 index. And if you give -x as the step count, then it would step every x'th value from the start index, till the stop index in the reverse direction. For example. a = '1234' print a[3:0:-1] This would return . 432

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

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

What does :-1 mean in python? [duplicate] Ask Question Asked 12 years, 4 months ago. Modified 2 years, 8 months ago. Viewed 162k times 33 . This question already has answers here: How slicing in Python works (38 answers) Closed 2 years ago. I'm trying to port some Python code to C, but I came across this line and I can't figure out what it means: if message.startswith('<stream:stream'): message = message[:-1] + ' />' ...

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