reading gctx from a non-fs file object #64

Hi,
In our settings there is often a need to read a .gctx file from a non-file (i.e. python file object).
Currently it is not possible with cmapPy. The parse method explicitly checks for the filename:

On the other hand h5py supports any file objects.

Would it be possible to rely on duck-typing in the parse function instead to allow for different types of input file objects?