Extracting Filename without Extension from a File Path in Python

string - How do I get the filename without the extension from a path in Python?

When working with files in Python, it’s often necessary to manipulate the file names and extensions to perform various tasks such as renaming or processing files. However, extracting the filename without the extension from a given path can be tricky. Fortunately, python provides a straightforward way to achieve this using the os.path module and also various others implemented below. In this article we will explore how to use Python to get the filename without the extension from a path, using a simple example and step-by-step instructions.

Implementing Filename Extraction Without Extension in Python

To extract the filename without the extension from a path in Python, you can use various techniques. Some of them include using str.rsplit() method, pathlib.Path() object, os.path.split() and os.path.splitext() functions, os.path.basename() and os.path.splitext() functions, re module, and str.partition() method. Each method provides a slightly different approach to achieve the desired outcome.

Let’s get started!

Example 1: Extract Filename with ‘str.rsplit()’ Method

In this method, we use the str.rsplit() method, splitting the path into the directory path and the filename with the extension. We then split the filename part again with the str.rsplit() method to obtain only the filename without the extension.

path =  "Path"  #Add the file path here
filename = path.rsplit('/', 1)[-1].rsplit('.', 1)[0]
print("Filename:",filename)

This code uses the str.rsplit() method to split the path into two paths first the directory path and second the filename with extension.Then it splits the filename part again using the str.rsplit() method to get only the filename without the extension.Enter your file path at path and later the filename data is printed.

Output:

Filename Output 5

Example 2: Utilize ‘pathlib.Path()’ Object for Filename Extraction

Using the pathlib.Path() object, we create a Path object from the given path. The stem attribute of the Path object provides the filename without the extension.

from pathlib import Path

path =  "Path"  #Add the file path here
filename = Path(path).stem
print("Filename:",filename)

This method uses the pathlib.Path() object to create a path object from the given path. To get the filename without the extension it uses the stem attribute of the path object. Enter your file path at path and later the filename data is printed.

Output:

Filename Output 4

Example 3: Implement ‘os.path.split()’ and ‘os.path.splitext()’ Functions

The os.path.split() function splits the path into the directory path and the filename with the extension. Subsequently, the os.path.splitext() function separates the filename and extension parts.

import os

path =  "Path"  #Add the file path here
filename = os.path.splitext(os.path.split(path)[1])[0]
print("Filename:",filename)

After importing the os module we define the os.path.split() function which is used to split the path into parts – the directory path and the filename with extension.To split the filename part into filename and extension parts we define os.path.splittext() function. Enter your file path at path and later the filename data is printed.

Output:

Filename Output 3

Example 4: Use ‘os.path.basename()’ and ‘os.path.splitext()’ Functions

We apply the os.path.basename() function to obtain the base filename from the path, then use os.path.splitext() to split the filename into its separate parts.

import os

path =  "Path"  #Add the file path here
filename = os.path.splitext(os.path.basename(path))[0]
print("Filename:",filename)

In this method, we use the os.path.basename() function to get the base filename from the path. Then split the filename into the filename and extension parts. Enter your file path at path and later the filename data is printed.

Output:

Filename Output 2

Example 5: Apply Regular Expressions with ‘re’ Module

Regular expressions permit the extraction of the filename without extension. The specific regular expression pattern and re.search() function provide a match object from which we extract the desired string using the group(0) method.

 import re

path =  "Path"  #Add the file path here
filename = re.search(r'[^/\\]+(?=\.\w+$)', path).group(0)
print("Filename:",filename)

This method uses regular expressions to extract the filename without the extension from the path. The regular expression r'[^/\\]+(?=\.\w+$)' matched any sequence of characters that doesn’t contain a forward slash or a backslash and that is immediately followed by a dot and one or more word characters at the end of the string.The re.search() function returns a match object from which we extract the matched string using the group(0) method. Enter your file path at path and later the filename data is printed.

Output:

Filename Output 1

Example 6: Acquire Filename with ‘str.partition()’ Method

With the str.partition() function, the path is split into three parts: the directory path, the filename without extension, and the extension. We concentrate on the second part to get the filename.

 
path =  "Path"  #Add the file path here
filename = path.rpartition('/')[2].rpartition('.')[0]
print("Filename:",filename)

We make use of str.partition() function to split the path into three parts first directory path, second the filename without extension, and third the extension. We focus only on the second part ie the filename, Enter your file path at path and later the filename data is printed.

Output:

Filename Output

Summary

Extracting the filename without the extension from a path in Python is a common task in file manipulation. By utilizing the os.path module, this task can be accomplished easily and efficiently. In this article, we have explored a simple example and step-by-step instructions on how to get the filename without the extension using Python. With this, we can now apply this technique to our own file-processing task.

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