diff --git a/lib/py/src/Thrift.py b/lib/py/src/Thrift.py
index 1be84e2..81689b7 100644
--- a/lib/py/src/Thrift.py
+++ b/lib/py/src/Thrift.py
@@ -4,3 +4,59 @@
 
   def process(iprot, oprot):
     pass
+
+class TException(Exception):
+
+  """Base class for all thrift exceptions."""
+
+  def __init__(self, message=None):
+    Exception.__init__(self, message)
+
+class TApplicationException(TException):
+
+  """Application level thrift exceptions."""
+
+  UNKNOWN = 0
+  UNKNOWN_METHOD = 1
+  INVALID_MESSAGE_TYPE = 2
+  WRONG_METHOD_NAME = 3
+  BAD_SEQUENCE_ID = 4
+  MISSING_RESULT = 5
+
+  def __init__(self, type=UNKNOWN, message=None):
+    TException.__init__(self, message)
+    self.type = type
+
+  def read(self, iprot):
+    iprot.readStructBegin()
+    while True:
+      (fname, ftype, fid) = iprot.readFieldBegin()
+      if ftype == TType.STOP:
+        break
+      if fid == 1:
+        if ftype == TType.STRING:
+          self.message = iprot.readString();
+        else:
+          iprot.skip(ftype)
+      elif fid == 2:
+        if ftype == TType.I32:
+          self.type = iprot.readI32();
+        else:
+          iprot.skip(ftype)
+      else:
+        iprot.skip(ftype)
+      iprot.readFieldEnd()
+    iprot.readStructEnd()
+
+  def write(self, oprot):
+    oprot.writeStructBegin('TApplicationException')
+    if self.message != None:
+      oprot.writeFieldBegin('message', TType.STRING, 1)
+      oprot.writeString(self.message)
+      oprot.writeFieldEnd()
+    if self.type != None:
+      oprot.writeFieldBegin('type', TType.I32, 2)
+      oprot.writeI32(self.type)
+      oprot.writeFieldEnd()
+    oprot.writeFieldStop()
+    oprot.writeStructEnd()