In this tutorial we’ll see how to write a Python program to delete all the files having a specific extension.
1. Using os.listdir()
In os module in Python there is a function listdir() that returns a list containing the names of the entries in the directory. You can iterate that list to look for file names that ends with a specific extension and delete those files.
We’ll use the directory structure as given below for the program
Test abc.txt abc1.txt newimage.png Sub1 (D) sub1.txt Sub2 (D) sub2.txt
def delete_files(dir_path): path = os.listdir(dir_path); for entry in path: print(entry) if entry.endswith(".txt"): p = os.path.join(dir_path, entry) print('Deleting', p) os.remove(p) delete_files("F:\knpcode\Python\Test")
abc.txt Deleting F:\knpcode\Python\Test\abc.txt abc1.txt Deleting F:\knpcode\Python\Test\abc1.txt newimage.png Sub1 Sub2
As you can see files with extension .txt in the directory Test are deleted. This program doesn’t delete files recursively in the sub-directories. If you want to delete files having specific extension in sub-directories too then you can make the above Python program to call function recursively or you can use functions in glob module.
Python program to delete files having specific extension recursively
def delete_files(dir_path): path = os.listdir(dir_path); for entry in path: print(entry) p = os.path.join(dir_path, entry) if os.path.isdir(p): print('Directory', p) # recursive call delete_files(p) else: if p.endswith(".txt"): print('Deleting', p) os.remove(p)
abc.txt Deleting F:\knpcode\Python\Test\abc.txt abc1.txt Deleting F:\knpcode\Python\Test\abc1.txt newimage.png Sub1 Directory F:\knpcode\Python\Test\Sub1 sub1.txt Deleting F:\knpcode\Python\Test\Sub1\sub1.txt Sub2 Directory F:\knpcode\Python\Test\Sub2 sub2.txt Deleting F:\knpcode\Python\Test\Sub2\sub2.txt
2. Using glob() module in Python
The glob module finds all the pathnames matching a specified pattern. You can use this module to find files with specific extension and delete them. In glob module there are functions glob() (returns a list) and iglob() (returns an iterator) that return matching pathnames.
In glob or iglob you can pass an argument recursive=True, If recursive is true, the pattern “**” will match any files and zero or more directories and subdirectories. By default recursive has the value false.
def delete_files(dir_path, ext): file_itr = glob.glob(dir_path + '/*' + ext, recursive=True) for entry in file_itr: print('Deleting', entry) os.remove(entry) delete_files("F:\knpcode\Python\Test\**", ".txt")
Deleting F:\knpcode\Python\Test\abc.txt Deleting F:\knpcode\Python\Test\abc1.txt Deleting F:\knpcode\Python\Test\Sub1\sub1.txt Deleting F:\knpcode\Python\Test\Sub2\sub2.txt
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