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Four Methods to Remove Filename Extensions in Python

Removing the Extension from a Filename in Python

Have you ever found yourself working with filenames and realized that you need to remove the extension from them? Perhaps you need to rename files or perform some sort of analysis on them and would like to remove the .txt or .csv at the end of the filename.

Fortunately, Python provides several ways to accomplish this task. In this article, we will explore four different methods you can use to remove the extension from a filename in Python.

Method #1: Using os.path.splitext()

The os module in Python provides a way to manipulate file paths. One of the methods it provides is os.path.splitext().

This method splits a filename into its base name and its extension. It returns a tuple containing the base name and the extension.

To remove the extension from a filename using this method, you can simply slice the base name from the tuple. Code Snippet:

“`

import os

filename = ‘example.txt’

base_name, extension = os.path.splitext(filename)

print(base_name)

“`

In this example, we import the os module and define a variable named filename with the value of example.txt. We then use the os.path.splitext() method to split the filename into its base name and extension.

Since we only need the base name, we assign it to a variable named base_name and print it. The output of this code will be example.

Method #2: Using pathlib.Path()

The pathlib module in Python provides an object-oriented way to manipulate file paths. One of the classes it provides is Path().

This class represents a path to a file or directory. It provides several methods to manipulate file paths, including with_suffix().

This method changes the suffix of the path to the specified suffix. To remove the extension from a filename using this method, you simply call with_suffix() with an empty string.

Code Snippet:

“`

from pathlib import Path

filename = ‘example.txt’

path = Path(filename)

base_name = path.with_suffix(”)

print(base_name)

“`

In this example, we import the Path class from the pathlib module, define a variable named filename with the value of example.txt, and create a new Path object with that filename. We then call the with_suffix() method on the path object and pass in an empty string as an argument.

This removes the suffix from the Path object, leaving only the base name. We assign the result to a variable named base_name and print it.

The output of this code will be example. Method #3: Using removesuffix() method

In Python 3.9, the str class introduced a new method called removesuffix().

This method returns a copy of the string with the specified suffix removed. To remove the extension from a filename using this method, you simply call removesuffix() with the extension you want to remove.

Code Snippet:

“`

filename = ‘example.txt’

base_name = filename.removesuffix(‘.txt’)

print(base_name)

“`

In this example, we define a variable named filename with the value of example.txt. We then call the removesuffix() method on the filename string and pass in .txt as an argument.

This removes the .txt suffix from the filename, leaving only the base name. We assign the result to a variable named base_name and print it.

The output of this code will be example. Method #4: Using str.rsplit() method

The str class in Python provides several methods to manipulate strings.

One of these methods is rsplit(). This method splits a string into substrings using a specified separator.

If you specify the right argument as an integer, it will split the string at the specified number of occurrences of the separator starting from the right side of the string. To remove the extension from a filename using this method, you can split the filename string at the rightmost period and slice the left side.

Code Snippet:

“`

filename = ‘example.txt’

base_name = filename.rsplit(‘.’, 1)[0]

print(base_name)

“`

In this example, we define a variable named filename with the value of example.txt. We then call the rsplit() method on the filename string and pass in .

as the separator and 1 as the right argument. This splits the string at the rightmost period and returns a list containing the left and right substrings.

Since we only want the left substring (the base name), we slice the first element of the list using [0]. We assign the result to a variable named base_name and print it.

The output of this code will be example.

Additional Resources

If you would like to learn more about manipulating file paths and working with filenames in Python, there are several resources available. The official Python documentation provides detailed explanations and examples of the os and pathlib modules.

There are also many tutorials and blog posts available online that cover file manipulation in Python. Some popular Python learning websites include Python.org, Real Python, and Python for Data Science Handbook.

Conclusion

In this article, we explored four different methods you can use to remove the extension from a filename in Python. We learned about the os.path.splitext() method, the pathlib.Path() class with_suffix() method, the str.removesuffix() method, and the str.rsplit() method.

Each method has its own advantages and disadvantages, depending on your specific use case. By understanding these methods, you can efficiently manipulate file paths and filenames in Python.

In this article, we explored four methods to remove the extension from a filename in Python. The first method uses the os.path.splitext() method, which returns a tuple containing the base name and extension of the file.

The second method uses the pathlib.Path() class with_suffix() method to modify the suffix. The third method describes the new str.removesuffix() method introduced in Python 3.9. Finally, the str.rsplit() method splits the file name into substrings using a separator and returns the left substring.

Manipulating file paths is an essential skill in Python, and understanding these methods can help developers efficiently manipulate file paths and filenames.

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