Python method to get the suffix name of a file and to update the suffix name of a file in a directory in batches

This article illustrates the python method of obtaining the suffix name of a file and batch updating the suffix name of a file in a directory. Share with you for your reference. The specific implementation method is as follows:

1. Get the suffix name of the file:

#!/usr/bin/python

import os

dict = {}

for d, fd, fl in os.walk('/home/ahda/Program/'):

        for f in fl:

                sufix = os.path.splitext(f)[1][1:]

                if dict.has_key(sufix):

                        dict[sufix] += 1

                else:

                        dict[sufix] = 1

for item in dict.items():

        print "%s : %s" % item

The key here is os.path.splitext()
For example, ABC /ef.g.h, here we get h

2. Python finds a file instance that traverses the specified file path with the specified suffix:

import os

import sys

import os.path

for dirpath, dirnames, filenames in os.walk(startdir):

        for filename in filenames:

            if os.path.splitext(filename)[1] == '.txt':

               filepath = os.path.join(dirpath, filename)

               #print("file:" + filepath)

               input_file = open(filepath)

               text = input_file.read()

               input_file.close()

               

               output_file = open( filepath, 'w')

               output_file.write(text)

               output_file.close()

3. Instance of file suffix in batch rename directory:

import os

def swap_extensions(dir, before, after):

    if before[:1] != '.': # If there is no suffix name in the argument '.' Then add 

        before = '.' + before

    thelen = -len(before)

    if after[:1] != '.':

        after = '.' + after

    for path, subdir, files in os.walk(dir):

        for oldfile in files:

            if oldfile[thelen:] == before:

                oldfile = os.path.join(path, oldfile)

                newfile = oldfile[:thelen] + after

                os.rename(oldfile, newfile)

                print oldfile +' changed to ' + newfile

if __name__ == '__main__':

    import sys

    if len(sys.argv) != 4:

        print 'Usage:swap_extension.py rootdir before after'

        sys.exit(1)

    swap_extensions(sys.argv[1], sys.argv[2], sys.argv[3])

Example: rename the file ending in.php under e:/py/test to.py
 
E: p y > Python_cook e: / py/test. PHP. Py
E: / py/testtest. PHP changed to e: / py/testtest. Py
E: / py/test1. PHP changed to e: / py/test1. Py
E: / py/test2. PHP changed to e: / py/test2. Py

I hope this article has helped you with your Python programming.