python: Add __repr__, property bindings to NocBlockBase

This commit adds a __repr__ function to the noc_block_base bindings,
which helpfully displays the block's unique ID, e.g.:

>>> block = g.get_block('0/VectorIIR#0')
>>> block
<NocBlock for block ID '0/VectorIIR#0'>

Also added are get_property_ids and set_properties functions, so Python
clients can set block properties by string if desired, e.g.:

>>> block.get_property_ids()
['alpha', 'beta', 'delay', 'max_delay']
>>> block.set_properties('alpha=0.45,beta=0.77,delay=41')
>>> viir = uhd.rfnoc.VectorIirBlockControl(block)
>>> viir.get_alpha(0)
0.45
>>> viir.get_beta(0)
0.77

0 files changed, 0 insertions, 0 deletions