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In this program, we need to print the duplicate elements present in the array.

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This can be done through two loops. The first loop will select an element and the second loop will iteration through the array by comparing the selected element with other elements. If a match is found, print the duplicate element. In the above array, the first duplicate will be found at index 4 which is the duplicate of the element 2 present at index 1. So, duplicate elements in the above array are 2, 3 and 8. JavaTpoint offers too many high quality services.

Mail us on hr javatpoint. Please mail your requirement at hr javatpoint. Duration: 1 week to 2 week. Python Tutorial. Next Topic Python Programs. Spring Boot. Selenium Py. Verbal A. Angular 7. Compiler D. Software E. Web Tech. Cyber Sec. Control S.

Data Mining. Javatpoint Services JavaTpoint offers too many high quality services. Python program to print the duplicate elements of an array In this program, we need to print the duplicate elements present in the array. STEP 2: Duplicate elements can be found using two loops. The outer loop will iterate through the array from 0 to length of the array.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

The dark mode beta is finally here. Change your preferences any time. Stack Overflow for Teams is a private, secure spot for you and your coworkers to find and share information. I am looking for a function in Python where you give a string as input where a certain word has been repeated several times until a certain length has reached.

The output would then be that word. The repeated word isn't necessary repeated in its whole and it is also possible that it hasn't been repeated at all. You can do it by repeating the substring a certain number of times and testing if it is equal to the original string.

You'll have to try it for every single possible length of string unless you have that saved as a variable. Loop through it in reverse and stop the first time you find something that's repeated in your string that is, it has a str.

Now if the same substring exists right next to itself, you can return it as the word you're looking for, however you must take into consideration the 'appleappl' example, where the proposed algorithm would return appl. If no such strings are found, you return the whole word since there are no repetitions.

Learn more. Asked 3 years, 4 months ago. Active 3 years, 4 months ago. Viewed 15k times. Apoorv Kansal 2, 6 6 gold badges 22 22 silver badges 35 35 bronze badges. Sieglinde Sieglinde 71 1 1 gold badge 1 1 silver badge 2 2 bronze badges. How does your program know what is a word?

For example, how would it know that 'appleapl' is not a single word? What about words that contain other words?

Find the first repeated word in a string in Python using Dictionary

I'll start with hints. If you're still stuck after trying those, post your attempted solution and we can give you more things to think about and try.We are given a string and we need to remove all duplicates from it? What will be the output if order of character matters? This problem has existing solution please refer Remove all duplicates from a given string.

An OrderedDict is a dictionary that remembers the order of the keys that were inserted first. If a new entry overwrites an existing entry, the original insertion position is left unchanged. This article is contributed by Shashank Mishra Gullu.

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Python: Find duplicates in a list with frequency count & index positions

Writing code in comment? Please use ide. Function to remove all duplicates from string. Recommended Posts: Remove duplicates from a given string Remove three consecutive duplicates from string Remove all consecutive duplicates from the string Remove duplicates from a string in O 1 extra space Python Remove duplicates in Matrix Python Remove Duplicates from a List Python Remove consecutive duplicates from list Python Remove duplicates from nested list Python Remove all duplicates words from a given sentence Python Ways to remove duplicates from list Python Remove all duplicates and permutations in nested list Python Sort given list by frequency and remove duplicates Python groupby method to remove all consecutive duplicates Python Remove duplicates based on Kth element tuple list Python - Remove front K characters from each string in String List.

Load Comments.In this article, we will discuss how to find duplicates in a list along with their frequency count and their index positions in the list. We have created a function that accepts a list and returns a dictionary of duplicate elements in that list along with their frequency count. When called, this function creates a new dictionary. Then iterates over all the elements in the given list one by one.

For each elements it checks if the element exists in the dictionary keys or not. Once the iteration of list elements ends, in this dictionary we have the frequency count of each element in the list. But as we are interested in duplicates only i. So, it removes the elements from this dictionary whose value is greater than 1. In the end, it returns a dictionary containing duplicate elements as keys and their frequency count as value.

Counter [ iterable-or-mapping ]. We can create an object of Counter class, using an iterable or any dict like mapping. This Counter object keeps the count of each element in iterable. Now we know the frequency count of each duplicate element in the list. But what if we want to know the index position of these duplicate elements in the list?

Now we want to know indices of each duplicate element in list and also their frequency count.

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Something like this. This function accepts a list of items and then iterates over the items in the list one by one to build a dictionary. In this dictionary, the key will be the element but value will be a list of. Your email address will not be published. This site uses Akismet to reduce spam. Learn how your comment data is processed.

List of strings. Keep pairs whose value is greater than 1 i. Iterate over each element in list.

Python Programming Tutorial - Find duplicates in a string using Counter method - GeeksforGeeks

If element exists in dict then increment its value else add it in dict. Filter key-value pairs in dictionary.

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Returns a dict of duplicate elements and thier frequency count. Get a dictionary containing duplicate elements in list and their frequency count. Remove elements from dictionary whose value is 1, i. Iterate over each element in list and keep track of index. Add a new entry in dictionary. Get duplicate elements with repeated count and index position of duplicates. Count occurrences of a single or multiple characters in string and find their index positions Python : Count elements in a list that satisfy certain conditions Python : How to Sort a Dictionary by key or Value?

Python : Get number of elements in a list, lists of lists or nested list Python : How to check if a key exists in dictionary? Python : 6 Different ways to create Dictionaries Python : How to convert a list to dictionary?

Python : How to find keys by value in dictionary?In this program, we need to find out the duplicate words present in the string and display those words.

find repeated strings python

To find the duplicate words from the string, we first split the string into words. We count the occurrence of each word in the string. If count is greater than 1, it implies that a word has duplicate in the string. JavaTpoint offers too many high quality services. Mail us on hr javatpoint. Please mail your requirement at hr javatpoint. Duration: 1 week to 2 week. Split ' ' ; Console. Next Topic. Spring Boot.

find repeated strings python

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In above example, the words highlighted in green are duplicate words. Algorithm Define a string. Convert the string into lowercase to make the comparison insensitive. Split the string into words.

find repeated strings python

Two loops will be used to find duplicate words. Outer loop will select a word and Initialize variable count to 1. Inner loop will compare the word selected by outer loop with rest of the words. If a match found, then increment the count by 1 and set the duplicates of word to '0' to avoid counting it again.

After the inner loop, if count of a word is greater than 1 which signifies that the word has duplicates in the string.By using our site, you acknowledge that you have read and understand our Cookie PolicyPrivacy Policyand our Terms of Service.

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find repeated strings python

Removing duplicate strings from a list in python [duplicate] Ask Question. Asked 8 years, 4 months ago. Active 6 years, 2 months ago. Viewed 76k times. Conrad Frix Shamika Shamika 1 1 gold badge 3 3 silver badges 6 6 bronze badges.

Active Oldest Votes. Mark Byers Mark Byers k gold badges silver badges bronze badges. Krumelur Krumelur 24k 6 6 gold badges 67 67 silver badges bronze badges. Same thing like one of the answers here but a little change, set is not really required! It does preserve order, but has quadratic complexity, and that is bad for any list remotely big. The Overflow Blog.

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Visit chat. Linked Related Hot Network Questions. Stack Overflow works best with JavaScript enabled.Prerequisite : Dictionary data structure. We have existing solution for this problem please refer Find the first repeated word in a string link. We can solve this problem quickly in python using Dictionary data structure.

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Find All Duplicate Characters from a String using Python

Prerequisite : Dictionary data structure Given a string, Find the 1st repeated word in a string. Function to Find the first repeated word in a string. Recommended Posts: Second most repeated word in a sequence in Python Find frequency of each word in a string in Python Python Dictionary to find mirror characters in a string Python Count occurrences of each word in given text file Using dictionary Python Convert string dictionary to dictionary Python - Get Nth word in given String Python - Kth word replace in String Python Replace rear word in String Python Removing Initial word from string Python program to capitalize the first and last character of each word in a string Python Converting String content to dictionary Python - Concatenate Dictionary string values Python Converting list string to dictionary Python program to create a dictionary from a string Python Convert dictionary object into string.

Shashank Mishra. Check out this Author's contributed articles. Load Comments.