small cleanups

larigira/audiogen_randomdir.py

@@ -8,11 +8,9 @@ import fnmatch
 
 def scan_dir(dirname, extension=None):
     if extension is None:
-        fnfilter = lambda fnames: fnames
-    else:
-        fnfilter = lambda fnames: fnmatch.filter(fnames, extension)
+        extension = '*'
     for root, dirnames, filenames in os.walk(dirname):
-        for fname in fnfilter(filenames):
+        for fname in fnmatch.filter(filenames, extension):
             yield os.path.join(root, fname)
 
 

larigira/timeform_frequency.py

@@ -1,5 +1,4 @@
 from datetime import datetime
-
 from pytimeparse.timeparse import timeparse
 from flask_wtf import Form
 from wtforms import StringField, DateTimeField, validators, \