In Exploring an NWB File, consider using html_repr

[bendichter]

The html repr function has improved greatly since the "Exploring an NWB File" notebook was created. Could you add it here? It could potentially replace the print.

To view the html_repr in a notebook, you just need the last line to return the value of the thing you are inspecting, e.g.

instead of

io = NWBHDF5IO(filepath, mode="r", load_namespaces=True)
nwb = io.read()

print(nwb)

you could simply write

io = NWBHDF5IO(filepath, mode="r", load_namespaces=True)
nwb = io.read()

nwb

This provides an interactive collapsable view of the file.

[rcpeene]

Implemented https://github.com/AllenInstitute/openscope_databook/commit/90519fabe98477cebd765dc20f8ee1407167e0ab