Check directory or existence of SQLITE files

This scans a directory to see if SQLITE files exist.  I need to enhance
this as is I scan a directory with odd character file names then it
seems to screw it up and say no files exist even if there are some, but
will work on most places

Author: geekcomputers

check_for_sqlite_files.py

@@ -0,0 +1,39 @@
+# Script Name	: check_for_sqlite_files.py
+# Author		: Craig Richards
+# Created		: 07 June 2013
+# Last Modified	:
+# Version		: 1.0
+
+# Modifications	:
+
+# Description	: Scans directories to check if there are any sqlite files in there 
+
+import os
+
+def isSQLite3(filename):
+    from os.path import isfile, getsize
+
+    if not isfile(filename):
+        return False
+    if getsize(filename) < 100: # SQLite database file header is 100 bytes
+        return False
+    else:
+        fd = open(filename, 'rb')
+        Header = fd.read(100)
+        fd.close()
+
+        if Header[0:16] == 'SQLite format 3\000':
+            return True
+        else:
+            return False
+
+log=open('sqlite_audit.txt','w')
+for r,d,f in os.walk(r'.'):
+  for files in f:
+    if isSQLite3(files):
+	  print files
+	  print "[+] '%s' **** is a SQLITE database file **** " % os.path.join(r,files)
+	  log.write("[+] '%s' **** is a SQLITE database file **** " % files+'\n')
+    else:
+	  log.write("[-] '%s' is NOT a sqlite database file" % os.path.join(r,files)+'\n')
+	  log.write("[-] '%s' is NOT a sqlite database file" % files+'\n')