moreniius
A project to contain custom components required to use eniius to produce NeXus Structure JSON from mccode-antlr simulated instruments.
Simply, more eniius.
Features
Path-based Navigation for NeXus Structure JSON
The NexusStructureNavigator class provides convenient path-based access to NeXus Structure JSON objects, which have a verbose hierarchical format. It supports both path-based access and chainable navigation.
Without Navigator (verbose)
from moreniius import to_nexus_structure, load_instr
structure = to_nexus_structure(load_instr('instrument.instr'))
# Access requires nested dictionary lookups
component = structure['children'][0]['children'][0]['children'][12]
# Accessing attributes is even more verbose
attrs = structure['children'][0]['attributes']
nx_class = next(a for a in attrs if a['name'] == 'NX_class')
With Navigator (clean and chainable)
from moreniius import to_nexus_structure, load_instr, NexusStructureNavigator
structure = to_nexus_structure(load_instr('instrument.instr'))
nav = NexusStructureNavigator(structure)
# Path-based access (returns Navigator for groups)
component = nav['/entry/instrument/component_name']
field = nav['/entry/instrument/component_name/field']
# Chainable navigation - each group access returns a new Navigator!
component = nav['entry']['instrument']['component_name']
# Get the underlying dictionary
raw_dict = component.dict() # or component.structure
# Access attributes with '@' prefix (returns raw dict)
nx_class = nav['/entry/@NX_class']
vector = nav['/entry/instrument/something/@vector']
# Attributes can also be accessed from Navigator objects
nx_class = nav['entry']['instrument']['mon0']['@NX_class']
# Check if paths exist
if nav.exists('/entry/instrument/mon0'):
mon0 = nav['/entry/instrument/mon0']
# Get with default value
result = nav.get('/entry/instrument/missing', default=None)
# Find all elements with a given name
monitors = nav.find_all('mon0')
# Find all attributes with a given name
all_nx_classes = nav.find_all('NX_class', include_attributes=True)
# Reverse lookup - get path to an element (requires raw dict)
path = nav.get_path(component.structure) # Returns '/entry/instrument/component_name'
attr_path = nav.get_path(nx_class) # Returns '/entry/@NX_class'
Key behaviors:
- Accessing a group (has
children) returns aNexusStructureNavigatorfor chaining - Accessing an attribute (with
@), dataset, or link returns the raw dictionary - Use
.dict()or.structureto get the underlying dictionary from a Navigator
See examples/path_navigator_demo.py for a complete working example.
1 maintainer
Metadata
1 maintainer
Release files for moreniius 0.10.1
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