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python - How to obtain the last index of a list? - Stack Overflow
Index -1 shows you the last index or first index of the end. But if you want to get only the last index, you can obtain it with this function: return len(input_list) - 1. In this case, the input is the list, and the output will be an integer which is the last index number. Did you mean len(list1)-1?
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3 Methods to Get Last Element of Array in Python - PyTutorial
In this tutorial, we'll learn how to get the last element of an array by using 3 different methods. One of the pretty simple method to get the last element of an array is Indexing. To get the last element, you can use the index -1. Here's an example: Output:
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Last Occurrence of Some Element in a List - Python
rindex () method in Python returns the index of the last occurrence of an element in a list. It searches the list from right to left ensuring that last index of the element is found. Explanation:
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Python List Index: Find First, Last or All Occurrences - datagy
In this tutorial, you’ll learn how to use the Python list index method to find the index (or indices) of an item in a list. The method replicates the behavior of the indexOf () method in many other languages, such as JavaScript. Being able to work with Python lists is an important skill for a Pythonista of any skill level.
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Python Array Tutorial – Define, Index, Methods - freeCodeCamp.org
3) Lastly, you could also use from array import *, with * importing all the functionalities available. You would then create an array by writing the array() constructor alone.
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Array Indexing in Python - Beginner's Reference - AskPython
Array Indexing means searching for elements in an array using the index (position) of elements for quick retrieval of information. Python arrays are variables that consist of more than one element. In order to access specific elements from an array, we use the method of array indexing.
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How to Use Python Array Index -1? - Python Guides
In this tutorial, I will explain how to use the Python array index -1 in detail with examples. In a recent Python webinar, array index -1 was the topic of the discussion. We will use index -1 to fetch the last element of the given collection without knowing the length of the collection. Let us learn more about this topic.
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Python Array Indexing - GeeksforGeeks
In Python, arrays support negative indexing where the last element of the array is accessed with index -1, the second-to-last element with index -2 and so on. Here's an example: Explanation: print (arr [-1]): This accesses the last element of the array, which is 50.
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Get the Last Element of List in Python - GeeksforGeeks
In Python, we can use -1 as an index to access the last element directly. 2. Using len () with Indexing. We can also find the last element by using len () function. Find length of the list and then subtracting one to get the index of the last element.
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Finding first and last index of some value in a list in Python
Perhaps the two most efficient ways to find the last index: lst.reverse() i = lst.index(value) lst.reverse() return len(lst) - i - 1. return len(lst) - operator.indexOf(reversed(lst), value) - 1. Both take only O (1) extra space and the two in-place reversals of the first solution are much faster than creating a reverse copy.