Find unexpected directory nesting patterns

nesting.py

"""                                                                             
Script to find folders with bad nesting patterns                                
(eg, in an arist-album organized music collection)                              
"""
import os,os.path,sys,shutil,pdb

colroot = sys.argv[1]
skiplist = ['desktop.ini','.DS_Store','Thumbs.db','FINDER.DAT']
log_f = open('nest_log.txt','w')

def noskip(fn):
    return not (fn in skiplist or '.jpg' in fn or '.JPG' in fn
                or '.txt' in fn or '.TXT' in fn)

for col in os.listdir(colroot):
    c = os.path.join(colroot,col)
    if(not os.path.isdir(c)):
        if(noskip(col)):
            log_f.write('Non-dir %s in %s\n' % (col,colroot))
        continue

    for artist in os.listdir(c):
        a = os.path.join(c,artist)
        if(not os.path.isdir(a)):
            if(noskip(artist)):
                log_f.write('Non-dir %s in %s\n' % (artist,c))
            continue
        for album in os.listdir(a):
            alb = os.path.join(a,album)
            if(not os.path.isdir(alb)):
                if(noskip(album)):
                    log_f.write('Non-dir %s in %s\n' % (album,a))
                continue
            for song in os.listdir(alb):
                s = os.path.join(alb,song)
                if(os.path.isdir(s)):
                    log_f.write('Dir %s in %s\n' % (song,alb))

log_f.close()