Delete last character python

How to remove the last character from a string in Python

In this Python tutorial, we are going to discuss how to remove the last character from a string in Python. Also, we will demonstrate interesting techniques to remove the last character from a string in Python with examples:

Python string remove last character

Sometimes, when working with strings in Python, you might find it necessary to remove the last character from a string. This could be due to the presence of an extra character, the need to truncate information, or some other type of data cleaning.

There are several ways to achieve this in Python. So, let’s discuss each of the ways in the detail with example:

Method 1: Using Python’s Slice Notation

The easiest and most Pythonic way to remove the last character from a string is to use Python’s slice notation.

Let’s say we have a string that represents the phrase of a famous American figure, Neil Armstrong: “That’s one small step for man, one giant leap for mankind.” If we want to remove the period at the end example is as follows:

s = "That's one small step for man, one giant leap for mankind." s = s[:-1] print(s) 

In this code, the Python [:-1] slice notation means “start at the beginning and go up to but not including the last element.” This will return all characters except the last one.

The output of this script would be:

Method 2: Using Python’s rstrip() Function

While slicing is a handy tool, Python’s built-in string method rstrip() can also be used to remove the last character from a string.

However, it’s important to note that rstrip() is designed to remove trailing characters. In the case where the last character is not known, or can vary, this method is not the most suitable.

Here we’ll use a well-known quote from Abraham Lincoln’s Gettysburg Address:

s = "Government of the people, by the people, for the people" s = s.rstrip(s[-1]) print(s)

In this example, Python rstrip(s[-1]) removes the trailing character that matches the last character of the string s .

The output of this script would be:

Method 3: Using the str[:-1] Approach

This method is nearly identical to the slice notation method but instead uses a string constructor for clarity. If you’re dealing with an object that might not be a string, this method is a safer bet.

In this example, we’ll use a common American saying:

s = "The early bird catches the worm" s = str(s[:-1]) print(s)

In this code, the Python str(s[:-1]) operation constructs a new string that includes every character except the last.

The output of this script would be:

Conclusion

In Python, removing the last character from a string can be accomplished in several ways. The slice notation method is typically the most straightforward and Pythonic approach.

However, rstrip() may be more suitable if you’re dealing with trailing characters, and str[:-1] offers a safe approach when the type of your data isn’t guaranteed.

You may also like to read the following Python tutorials.

I am Bijay Kumar, a Microsoft MVP in SharePoint. Apart from SharePoint, I started working on Python, Machine learning, and artificial intelligence for the last 5 years. During this time I got expertise in various Python libraries also like Tkinter, Pandas, NumPy, Turtle, Django, Matplotlib, Tensorflow, Scipy, Scikit-Learn, etc… for various clients in the United States, Canada, the United Kingdom, Australia, New Zealand, etc. Check out my profile.

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5 Ways to Remove the Last Character From String in Python

String Manipulation is the most important feature in python. You can manipulate the string by many methods such as String slicing techniques, looping over the elements, and string methods. Sometimes we come to the situation where we require to remove the last character from the string in Python as it is added by mistake. So here, we will focus on removing the last character from the string.

Different Ways to Remove Last Character From String in Python

Let us discuss certain methods through which we can remove or delete the last character from a string:

1. Using Positive index by slicing

We can remove or delete the last character from the string by accessing the given string’s positive index.

Let us look at the example for the better understanding of the concept:

#python slicing using positive index Str = "Latracal Solutionss" l = len(Str) Remove_last = Str[:l-1] print("String : ",Remove_last)

String : Latracal Solutions

Explanation:

Here, we have taken a sample string. Then we have calculated the length of the string to access the last character of the string. Finally, we have used slicing for removing the last character of the string and then printed the output. Hence, we have seen that the unwanted character has been removed.

2. Using Negative Index by Slicing

We can also remove or delete the last character from the string by accessing the given string’s negative index.

Let us look at the example for the better understanding of the concept :

#python slicing using negative index Str = "Latracal Solutionss" #last character is always at -1 position Remove_last = Str[:-1] print("String : ",Remove_last)

String : Latracal Solutions

Explanation:

Here, we have taken a sample string str = “Latracal Solutionss.” Then for removing the last character of the string, the indexing always starts from -1. By slicing it from the -1 index, we have removed the last character of the string. At last, we have printed the output. Hence, we have seen that the unwanted character has been removed.

3. Using the rstrip function to Remove Last Character From String in Python

The string method rstrip is used to remove the characters from the right side of the string that is given to it. So we will be using it to remove or delete the last character of the string. It can be done only in a single line of code and straightforward method to remove the last character from the string.

Let us look at the example for the better understanding of the concept:

#taking input from the user str = input("Enter the string : ") remaining_string = str.rstrip(str[-1]) print("String : ",remaining_string)

Enter the string : Latracal solutionss String : Latracal solution

Explanation:

Here firstly, we have taken input from the user in the form of a string. Secondly, we have used the rstrip function in the given string and operated it to remove the last character from the string. At last, we have printed the output. Hence, we have seen that the unwanted character has been removed.

4. Using for loop to Remove Last Character From String in Python

We can also use the for loop to remove or delete the last character from the string. We will take out the length of the string from the len() function. Then we will take an empty string. After that, we will run the loop from 0 to l-2 and append the string into the empty string. At last, we will print the output as the remaining string.

Let us look at the example for the better understanding of the concept:

#sample string str = "Latracal Solutionss" #length of the string l = len(str) #empty string Final_string = "" #using loop #add the string character by character for i in range(0,l-2): Final_string = Final_string + str[i] print("Final String : ",Final_string)

Final String : Latracal Solution

Explanation:

Here firstly, we have taken the sample str = “Latracal Solutionss.” Secondly, we have calculated the length of the string through the len() function. Thirdly, we have taken an empty string to append the string to form the new string. Fourthly, we have used the for loop from the 0th index to l-2, and by each iteration, we have appended the character in the empty string. At last, we have printed the final string formed. Hence, we have seen that the unwanted character has been removed.

5. Using regex function

We can use regex() function in python, to match 2 groups in a string i.e.

• Group 1: Every character in string except the last characters.
• Group 2: Last character of a string.

Let us look at the example for the better understanding of the concept :

import re def second_group(m): return m.group(1) #sample string str = "Latracal Solutionss" # Remove last character from string Final_String = re.sub("(.*)(.$)", second_group, str) print("Final String : ",Final_String)

Final String : Latracal Solutions

Explanation:

Here firstly, we have imported the re module from python for regex. Secondly, we have made the Second_group function which will only return only group 1 from the match object delete other groups. Thirdly, we have taken a sample string str = “Latracal Solutionss.” Fourthly, we have applied the function with the proper syntax and tried to remove the last character only by putting value = 1 in the given syntax. Finally, we have printed the output and checked that the last character from the string was removed or deleted.

Conclusion

In this tutorial, we have learned about all the methods through which we can remove or delete the string’s last character. All the methods are explained in deep with the help of examples. The basic and the easiest method was to use positive and negative indexes. You can use any of the methods you like to use according to your program or project requirement.

However, if you have any doubts or questions, do let me know in the comment section below. I will try to help you as soon as possible.

Happy Pythoning!

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