How to remove Triplicate Letters in Python

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So I'm a little confused as far as putting this small code together. My teacher gave me this info:

Iterate over the string and remove any triplicated letters (e.g. "byeee mmmy friiiennd" becomes "bye my friennd"). You may assume any immediate following same letters are a triplicate.

I've mostly only seen examples for duplicates, so how do I remove triplicates? My code doesn't return anything when I run it.

def removeTriplicateLetters(i):
    result = ''
    for i in result:
        if i not in result:
            result.append(i)
    return result

def main():
    print(removeTriplicateLetters('byeee mmmy friiiennd'))


main()

Without going in to writing the code to resolve the problem.

When you iterate over the string, add that iteration to a new string. If the next iteration is the same as the previous iteration then do not add that to the new string.

This will catch both the triple and the double characters in your problem. Tweaked a previous answer to remove a few lines that were not needed.

def remove_n_plicates(input_string, n):
    i=0
    result = ''
    while(True):
        result += input_string[i]
        if input_string[i:i+n] == input_string[i]*n:
            i += n
        else:
            i += 1

        if i >= len(input_string):
            break
    return result


input_string = "byeee mmmy friiiennd"
output_string = remove_n_plicates(input_string, 3)
print(output_string)
# bye my friennd

Removing duplicate characters from a string, join() will join the letters back to a string in arbitrary order. If order does matter, you can use a dict instead of a set, which since Python 3.7  A Computer Science portal for geeks. It contains well written, well thought and well explained computer science and programming articles, quizzes and practice/competitive programming/company interview Questions.

I have generalized the scenario with "n". In your case, you can pass n=3 as below

def remove_n_plicates(input_string, n):
    i=0
    final_string = ''
    if not input_string:
        return final_string
    while(True):
        final_string += input_string[i]
        if input_string[i:i+n] == input_string[i]*n:
            i += n
        else:
            i += 1

        if i >= len(input_string):
            break

    return final_string


input_string = "byeee mmmy friiiennd"
output_string = remove_n_plicates(input_string, 3)
print(output_string)
# bye my friennd

You can use this for any "n" value now (where n > 0 and n < length of input string)

Python: Remove duplicate characters of a given string, Write a Python program to remove duplicate characters of a given string. Sample Solution:- Python Code: from collections import OrderedDict def remove_duplicate(str1): return "".join(OrderedDict.fromkeys(str1)) print(remove_duplicate("python exercises practice solution")) print(remove_duplicate("w3resource")) print(mylist) Create a dictionary, using the List items as keys. This will automatically remove any duplicates because dictionaries cannot have duplicate keys.

Your code returns an empty string because that's exactly what you coded:

result = ''
for i in result:
    ...
return result

Since result is an empty string, you don't enter the loop at all. If you did enter the loop you couldn't return anything:

for i in result:
    if i not in result:

The if makes no sense: to get to that statement, i must be in result

Instead, do as @newbie showed you. Iterate through the string, looking at a 3-character slice. If the slice is equal to 3 copies of the first character, then you've identified a triplet.

    if input_string[i:i+n] == input_string[i]*n:

Python || Q14. Program to remove duplicate characters from the , java python python python by durgasoft python videos by durgasoft Python Online Training Duration: 12:20 Posted: Apr 12, 2019 Previous: Write a Python program to capitalize first and last letters of each word of a given string. Next: Write a Python program to compute sum of digits of a given string. What is the difficulty level of this exercise?

Here's a fun way using itertools.groupby:

def removeTriplicateLetters(s):
    return ''.join(k*(l//3+l%3) for k,l in ((k,len(list(g))) for k, g in groupby(s)))

>>> removeTriplicateLetters('byeee mmmy friiiennd')
'bye my friennd'

string remove repeated letters in python, Code in Python to remove repeated letters from a string. Like and share. It's FREE too Duration: 0:41 Posted: Jun 30, 2018 Writing programs without using any modules. We can use different methods of Python to achieve our goal. First, we will find the duplicate characters of a string using the count method. Let's see the procedure first. Initialize a string. Initialize an empty list; Loop over the string.

just modifying @newbie solution and using stack data structure as solution

def remove_n_plicates(input_string, n):
    if input_string =='' or n<1:
        return None

    w = ''
    c = 0
    if input_string!='':
        tmp =[]
        for i in range(len(input_string)):
            if c==n:
                    w+=str(tmp[-1])
                    tmp=[]
                    c =0

            if tmp==[]:
                tmp.append(input_string[i])
                c = 1
            else:

                if input_string[i]==tmp[-1]:
                    tmp.append(input_string[i])
                    c+=1
                elif input_string[i]!=tmp[-1]:
                    w+=str(''.join(tmp))
                    tmp=[input_string[i]]
                    c = 1
        w+=''.join(tmp)                   


        return w


input_string = "byeee mmmy friiiennd nnnn"
output_string = remove_n_plicates(input_string, 3)
print(output_string)

output

bye my friennd nn

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Remove duplicate letters in a word, Remove duplicate letters in a word. Steven Taschuk staschuk at telusplanet.net. Sun Jun 22 13:57:12 EDT 2003. Previous message (by thread): Remove  Python Overview Python Built-in Functions Python String Methods Python List Methods Python Dictionary Methods Python Tuple Methods Python Set Methods Python File Methods Python Keywords Python Exceptions Python Glossary Module Reference Random Module Requests Module Math Module cMath Module Python How To Remove List Duplicates Reverse a String

How to remove duplicates from a string (in-place), A quick one in Python - [code] def removeDuplicates(string): uniqs = '' for x in string: if Originally Answered: How do I remove duplicate characters in a string​? A2A: Strings are immutable in Python, which means they cannot be changed. Not to worry, though, you can simply create a new string with the changes. Suppose we want to remove spaces from a string.

Remove all duplicates from a given string in Python, To remove all duplicates from a string in python, we need to first split the string by spaces so that we have each word in an array. Then there are  For this, we can remove them easily, by storing a list of words that you consider to stop words. NLTK(Natural Language Toolkit) in python has a list of stopwords stored in 16 different languages. You can find them in the nltk_data directory.

Comments
  • What about 4 in row? Results in 1 or 2 occurrences?