How do i remove a specific character from a list in python?
EDIT: For anyone who came across this post, just for understanding the above removes any elements from the list which are equal to 8. Show
Supposing we use the above example the first element ("aaaaa8") would not be equal to 8 and so it would be dropped. To make this (kinda work?) with how the intent of the question was we could perform something similar to this
What this does is split each element of list up into an array of characters so ("aaaa8") would become ["a", "a", "a", "a", "8"]. This would result in a data type that looks like this msg = [["a", "a", "a", "a"], ["b", "b"]...] So finally to wrap that up we would have to map it to bring them all back into the same type roughly
I would absolutely not recommend it, but if you were really wanting to play with map and filter, that would be how I think you could do it with a single line. In this article, we will discuss different ways to remove a character from a list of strings in python. Suppose we have a list of strings, Now, we want to remove all occurrences of character ‘w’ rom this list of strings. After that list should be like this, There are different ways to do this. Let’s discuss them one by
one, Strings are immutable in python, so we can not modify them in place. But we can create a new string with the modified contents. So create a new list with the modified strings and then assign it back to the original variable. Advertisements For that, use the list comprehension to iterate over all strings in the list. Then for each string, call the replace() function to
replace all occurrences of the character to be deleted with an empty string. Finally list comprehension will return a new list of modified strings. Let’s see it in working code, Output: It deleted all occurrences of character ‘w’ from the list of strings. We can also use the map() function to remove a character from all the strings in a list. Steps are as follows, Working example is as follows, Output: It deleted all occurrences of character ‘w’ from the list of strings. Summary: We learned about two different ways to delete a character from a list of strings in python. You are here: Home / Basics / Remove All Occurrences of a Character in a List or String in Python In areas like natural language processing, data science, and data mining, we need to process a huge amount of text data. For this, we normally use strings and lists in Python. Given a list of characters or a string, we sometimes need to remove one or all occurrences of a character from the list or string. In this article, we will discuss different ways to remove all the occurrences of a character from a list or a string in python. Table of Contents
Remove an Element From a List Using the pop() MethodGiven a list, we can remove an element from the list using the
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In the above example, you can see that the last element of the list has been removed from the list after the execution of the
However, If the input list is empty, the program will run into
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You can observe that the program has run into an You can also remove the element from a specific index in the list using the The
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Here, We have popped out the element at index 3 of the list using the Delete an Element From a List Using the remove() MethodIf you don’t know the index of the element that has to be removed, you can use the You can observe this in the following example.
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In the above example, you can
see that the 1st occurrence of element 3 is removed from the list after the execution of the If the value given in the input argument to the
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In the above example, the list is empty. Hence, the number 3 isn’t an element of the list. Therefore, when we invoke the Till now, we have discussed how to remove an element from a list. Let us now discuss how we can remove all occurrences of a character in a list of characters in python. Given a list of characters, we can remove all the occurrences of a value using a for loop and the
After execution of the for loop, we will get the output list of characters in outputList. In the outputList, all the characters except those that we need to remove from the original list will be present. You can observe this in the following python program.
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Delete All Occurrences of a Character From a List Using List ComprehensionInstead of using the for loop, we can use list comprehension and the membership operator ‘ The
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Using list comprehension and the ‘
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Remove All Occurrences of an Element From a List Using the remove() MethodInstead of creating a new list, we can also remove all the instances of a character from the original list. For this, we will use the
In this way, we will get the output list by modifying the original list as shown below.
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Delete All Occurrences of a Character Using the filter() FunctionWe can also use the The If the output of To remove all the occurrences of a given item in a list using the
You can observe the entire process in the following example.
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Instead of defining the function
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Till now, we have discussed different methods to remove all the occurrences of a character in a list. Now we will discuss how we can remove occurrences of a specific character from a python string. Remove All Occurrences of a Character From a String in PythonGiven an input string, we can remove one or all occurrences of a character from a string using different string methods as well as a regular expression method. Let us discuss each of them one by one. Delete All Occurrences of a Character From a String in Python Using for LoopTo remove all the occurrences of the particular character from a string using the for loop, we will follow the following steps.
After iterating till the last character of the string using the for loop using the above steps, we will get the output
string in the new string named
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Remove All Occurrences of a Character From a String in Python Using List ComprehensionInstead of using the for loop, we can remove the occurrences of a specific value from a given string using the list comprehension and the
Output:
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Delete All Occurrences of a Character From a String in Python Using the split() MethodWe can also use the To remove all the occurrences of a given character from a given string, we will use the following steps.
You can observe the entire process in the following example.
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Remove All Occurrences of a Character From a String in Python Using the filter() FunctionWe can also use the The If the output of To remove all the occurrences of a given character in a string, we will follow the following steps.
You can observe the entire process in the following code.
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Instead of defining the function
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Delete All Occurrences of a Character From a String in Python Using the replace() MethodThe After execution, the To remove all the occurrences of a given character from a string, we will invoke the After execution, all the occurrences of character will be replaced by an empty string. Hence, we can say that the character has been removed from the string. You can observe the entire process in the following example.
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Remove All Occurrences of a Character From a String in Python Using the translate() MethodWe can also use the The translation table can be created using the We will use the following steps to remove the given character from the string.
You can observe the entire process in the following code.
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Delete All Occurrences of a Character From a String in Python Using Regular ExpressionsRegular expressions provide one of the most efficient ways to manipulate strings or text data. To remove a character from a string, we can use the To remove all the occurrences of a character from a given string, we will use the following steps.
After execution, the You can observe this in the following code.
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ConclusionIn this article, we have discussed different ways to remove all the occurrences of a character from a list. Likewise, we have discussed different approaches to remove all the occurrences of a character in a string. For lists, I would suggest you use the approach with the I hope you enjoyed reading this article. Stay tuned for more informative articles. Happy Learning! Recommended Python TrainingCourse: Python 3 For Beginners Over 15 hours of video content with guided instruction for beginners. Learn how to create real world applications and master the basics. How do I remove an item from a list in Python?Items of the list can be deleted using del statement by specifying the index of item (element) to be deleted. We can remove an item from the list by passing the value of the item to be deleted as the parameter to remove() function. pop() is also a method of list.
How do I remove a specific string from a list?Method #1 : Using remove()
This particular method is quite naive and not recommended to use, but is indeed a method to perform this task. remove() generally removes the first occurrence of K string and we keep iterating this process until no K string is found in list.
How do I remove a specific value from a list index?You can use the pop() method to remove specific elements of a list. pop() method takes the index value as a parameter and removes the element at the specified index. Therefore, a[2] contains 3 and pop() removes and returns the same as output. You can also use negative index values.
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