[Python.NET] Access functions in dll class

Hello Everybody I am able to import the dll and able to access the class of the dll. But when I am trying to access the methods in the dll its showing error. #Class1 is the class in dll and next is the function. Class1.Bin_To_Dec("11") Traceback (most recent call last): File "", line 1, in <module> Class1.Bin_To_Dec("11") TypeError: No method matches given arguments Please help me to find out where am i wrong? Do I need to create object of dll class and then access it? If yes then how can I access it? Thanks Navneet