A simple script (written in python) that I used to move thousands of .mp3 files from different nested folders to music folder.

mfFiles.py

#importing libraries
import os
import shutil

#define source dir
src_dir = "temp/"

#define destination dir
des_dir = "temp2"

#defines extension
ext = '.mp3'

#file walker  
for root, dirs, files in os.walk(src_dir):
    for file in files:
    	#to move files with above mentioned extension (remove this to move all files)
        if file.endswith(ext):
 	    #printing current file and it's name	   	 
    	    print root+"/"+file
    	#moving current file
	    shutil.move(root+"/"+file, des_dir+"/"+file)