Tag: indices
Python : Find unique values in a numpy array with frequency & indices | numpy.unique()
In this article we will discuss how to find unique values / rows / columns in a 1D & 2D Numpy array. Also how to find their index position & frequency count using numpy.unique(). numpy.unique() Python’s numpy module provides a function to find the unique elements in a numpy array i.e. Advertisements numpy.unique(ar, return_index=False, return_inverse=False, return_counts=False, …
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Python : Find occurrence count & all indices of a sub-string in another string | including overlapping sub-strings
In this article we will discuss different ways to count occurrences of a sub-string in another string and also their index positions. Count occurrences of a sub-string in another string using string.count() Python’s String class contains a method to count the non overlapping occurrences of a sub-string in the string object i.e. string.count(s, sub[, start[, …
Find frequency of each character in string and their indices | Finding duplicate characters in a string
In this article we will discuss different ways to fetch the frequency or occurrence count of each character in the string and their index positions in the string using collections.Counter() and regex. Get Frequency of each character in string using collections.Counter() collections.counter(iterable-or-mapping) Counter is a dict subclass and collections.Counter() accepts an iterable entity as argument …
Python: Remove elements from list by index or indices
This article will discuss different ways to remove single or multiple elements from a list by the index positions. Table of Contents Python: Remove an element from a list by index using the pop() function Python: Remove an element from the list by index using del keyword Python: Remove an element from list by index …
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Get indices of N maximum values in a NumPy array in Python
In this article, we will learn how to get indices of N maximum values in a NumPy array. Table Of Contents Introduction Method 1: Using argpartition() function Method 2: Using argsort() function. Method 3: Using nlargest() of heapq module. Method 4. Iterating and finding indices of n maximum values Summary Introduction Suppose we have a …
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Get indices of True values in a boolean List in Python
In this article, we will discuss different ways to get the indices of True values in a bool list in Python. Table Of Contents Introduction Method 1: Using List comprehension Method 2: Using for loop & enumerate() Method 3: Using NumPy Method 4: Using filter() function Method 5: Using itertools Summary Introduction Suppose we have …
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Get the indices of sorted List in Python
In this article, we will discuss different ways to get the indices of sorted List in Python. Table Of Contents Introduction Get the indices of sorted List using sorted() function Get the indices of sorted List using enumerate() & sorted() Get the indices of sorted List using NumPy Summary Introduction Suppose we have a list …
Get all items at odd indices of a List in Python
In this article, we will discuss different ways to fetch all items at odd index positions of a List in Python. Table Of Contents Method 1: Using List Slicing Method 2: Using enumerate() Method 3: using List Comprehension Method 4: using List Comprehension & AND operator Summary Method 1: Using List Slicing We can slice …
Get sublist from List based on indices in Python
This tutorial will discuss about unique ways to get sublist from list based on indices in Python. Table Of Contents Method 1: Using List Comprehension Method 2: Using operator.itemgetter() Summary Method 1: Using List Comprehension Iterate over list of index positions using a List comprehension, and for each index position, select the element at that …