run with "python as3_unused_imports.py <directory to search recursively>"

as3_unused_imports.py

#!/usr/bin/python 
import sys, re 
from os import walk 
from os.path import join as pathjoin 
from pprint import pprint as pp 
 
def parsef(f): 
  imports = [] 
  notimports = [] 
  for line in file(f):    
    r = re.search("^\s*import\s*(.*)\s*;\s*$", line) 
    if r: imports.append(r.groups()[0]) 
    else: notimports.append(line) 
  return imports, notimports 
 
#be super conservative and don't list any imports whose name is mentioned anywhere in the file
def find_unused(notimports, imports): 
  return [i for i in imports if "".join(notimports).find(i) == -1] 
 
root = sys.argv[-1] 
for dirpath, dirnames, filenames in walk(root): 
  for f in (f_ for f_ in filenames if f_.endswith(".as")): 
    f = pathjoin(dirpath, f) 
    imports, notimports = parsef(f) 
    classnames = [x[x.rfind(".")+1:] for x in imports] 
    unused = find_unused(notimports, classnames) 
    if unused: 
      print f + " :" 
      pp(unused)