How to open an MDF file using python?

Question

In my code I have:

import mdfreader

mdf = mdfreader.Mdf('SERVER.mdf')

And upon running the code, I receive an exception:

Exception: file SERVER.mdf is not an MDF file!

The MDF file is in the same folder as my Python program.

If it cannot be fixed:

• Is my MDF file corrupt?
• How can I get the data out of my file? I've also tried the asammdf library but it didn't work.

Documentation for the mdfreader module is appreciated. I'm new to programming, so sorry if this is a stupid question!