[Python] Getting a FileNotFoundException in Python

This is my code:

try:
import clr, sys
from xml.dom.minidom import parse
import datetime
sys.path.append("C:\\teest")
clr.AddReference("TCdll")
from ClassLibrary1 import Class1
cl = Class1()
except ( ImportError ) :
print "Module may not be existing "


My TCdll is in C:\test. I just gave it as C:\teest to know the error.

Exception is this:

Traceback (most recent call last):
File "C:/Python25/13thjan/PSE.py", line 8, in <module>
clr.AddReference("TCdll")
FileNotFoundException: Unable to find assembly 'TCdll'.
at Python.Runtime.CLRModule.AddReference(String name)


How to handle this exception?

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