https://github.com/seb-m/pyinotify/issues/15

pyinotify.get_wd.patch

--- pyinotify.py.orig	2011-06-26 12:57:41.000000000 +0100
+++ pyinotify.py.new6	2011-06-26 17:17:56.000000000 +0100
@@ -69,6 +69,7 @@
 import re
 import asyncore
 import glob
+import hashlib
 
 try:
     from functools import reduce
@@ -1729,6 +1730,9 @@
         """
         self._exclude_filter = exclude_filter
         self._wmd = {}  # watch dict key: watch descriptor, value: watch
+        self._wmdp = {}  # watch dict key: sha(watch path), value: watch descriptor
+        self._wmdpr = {}  # watch dict key: watch descriptor, value: sha(watch path)
+        
 
         self._inotify_wrapper = INotifyWrapper.create()
         if self._inotify_wrapper is None:
@@ -1778,6 +1782,8 @@
         """
         try:
             del self._wmd[wd]
+            del self._wmdp[self._wmdpr[wd]]
+            del self._wmdpr[wd]
         except KeyError, err:
             log.error(str(err))
 
@@ -1816,6 +1822,9 @@
         watch = Watch(wd=wd, path=path, mask=mask, proc_fun=proc_fun,
                       auto_add=auto_add, exclude_filter=exclude_filter)
         self._wmd[wd] = watch
+        tpath = hashlib.sha1(path).digest()
+        self._wmdp[tpath] = wd
+        self._wmdpr[wd] = tpath
         log.debug('New %s', watch)
         return wd
 
@@ -2039,10 +2048,9 @@
         @return: WD or None.
         @rtype: int or None
         """
-        path = self.__format_path(path)
-        for iwd in self._wmd.items():
-            if iwd[1].path == path:
-                return iwd[0]
+        path = hashlib.sha1(self.__format_path(path)).digest()
+        if path in self._wmdp:
+            return self._wmdp[path]
 
     def get_path(self, wd):
         """
@@ -2113,6 +2121,8 @@
             # Remove watch from our dictionary
             if awd in self._wmd:
                 del self._wmd[awd]
+                del self._wmdp[self._wmdpr[awd]]
+                del self._wmdpr[awd]
             ret_[awd] = True
             log.debug('Watch WD=%d (%s) removed', awd, self.get_path(awd))
         return ret_