Python：如何解决IndentationError

#!/usr/bin/env python
import os
import glob
import shutil
import mutagen
from sys import exit

musicdir = raw_input("What directory are the music files located in? : ")
musfile = glob.glob(musicdir + '/' + "*.mp3")
musfile1 = glob.glob(musicdir + '/' + "*.flac")
musfile.extend(musfile1)
newmusicdir = raw_input("What directory should the music files be organized into? : ")


done = False

while not done:
    for m in musfile:
        if musfile:
            try:
                musta = mutagen.File(m,easy=True)
                mar = str(musta['artist'][0])
                mal = str(musta['album'][0])
                mti = str(musta['title'][0])
                mtr = str(musta['tracknumber'][0])
                os.makedirs(newmusicdir + '/' + mar + '/' + mal + '/')
            except OSError:
                pass
            finally:
                try:
                    if m.endswith('.mp3'):
                        os.rename(m,mtr + ' - ' + mar + ' - ' + mti + '.mp3')
                        m =mtr + ' - ' + mar + ' - ' + mti + '.mp3'
                        shutil.move(m,newmusicdir + '/' + mar + '/' + mal + '/')
                    elif m.endswith('.flac'):
                        os.rename(m,mtr + ' - ' + mar + ' - ' + mti + '.flac')
                        m = mtr + ' - ' + mar + ' - ' + mti + '.flac'
                        shutil.move(m,newmusicdir + '/' + mar + '/' + mal + '/')
        elif not musfile:
                print "Looks like we're done here. Please press <enter> to exit"
                raw_input()
                sys.exit(0)