mimerenamer.py

import os
import sys
import subprocess
import mimetypes

def get_mimetype(loc):
    process = subprocess.Popen(['mimetype',loc], stdout=subprocess.PIPE)
    output, err = process.communicate()

    if err != None:
        return None
    else:
        return output.split(':')[1].strip()

def get_extension(loc):
    mime = get_mimetype(loc)
    if mime == None or mime == '':
        return None
    return mimetypes.guess_extension(mime)

def remove_extension(name):
    return name.split('.')[0]
    
def remove_extensions(loc):
    files = os.listdir(loc)
    for fil in files:
        if fil.endswith('.obj'):
            new_name = remove_extension(fil)
            os.rename(fil, new_name)
            
def main(loc):
    files = os.listdir(loc)
    for fil in files:
        if '.' in fil:
            continue
            
        ext = get_extension(fil)
        if ext == None:
            continue
        os.rename(fil, fil + ext)

if __name__ == '__main__':
    if len(sys.argv) < 2:
        print "Syntax to run this script"
        print sys.argv[0] + " <folder location>"
    else:
        main(sys.argv[1])
        #remove_extensions(sys.argv[1])