FEAT: component to instance helper functions

[daquintero]

Hi Floris,

Hope you're well. I have found these helper functions quite useful when iterating over a range of designs.

They work like:

import gdsfactory as gf
import sax
component = gf.components.mzi2x2_2x2()
component_netlist_recursive = component.get_netlist_recursive()
sax_recursive_netlist = sax.netlist(component_netlist_recursive)
sax.get_netlist_instances_by_prefix(sax_recursive_netlist, prefix="")
# > eg. ['mzi_d46c281f']
sax.get_component_instances(
    recursive_netlist=sax_recursive_netlist, top_level_prefix="mzi_d46c281f", component_name_prefix=""
)
"""
{'': ['bend_euler_1',
  'bend_euler_2',
  'bend_euler_3',
  'bend_euler_4',
  'bend_euler_5',
  'bend_euler_6',
  'bend_euler_7',
  'bend_euler_8',
  'cp1',
  'cp2',
  'straight_10',
  'straight_5',
  'straight_6',
  'straight_7',
  'straight_8',
  'straight_9',
  'sxb',
  'sxt',
  'syl',
  'sytl']}
"""
sax.get_component_instances(
    recursive_netlist=sax_recursive_netlist, top_level_prefix="mzi_d46c281f", component_name_prefix="straight"
)
"""
{'straight': ['straight_10',
  'straight_5',
  'straight_6',
  'straight_7',
  'straight_8',
  'straight_9',
  'sxb',
  'sxt',
  'syl',
  'sytl']}
"""

What do you think?

[flaport]

Thanks @daquintero . Will be available in sax>=0.8.9.