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Implement 'find_feature' Utility Function in SBOL Tutorial #237

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Implement 'find_feature' Utility Function in SBOL Tutorial #237

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16 changes: 15 additions & 1 deletion sbol_utilities/helper_functions.py
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Original file line number Diff line number Diff line change
Expand Up @@ -363,4 +363,18 @@ def is_circular(obj: Union[sbol3.Component, sbol3.LocalSubComponent, sbol3.Exter
:param obj: design to be checked
:return: true if circular
"""
return any(n==sbol3.SO_CIRCULAR for n in obj.types)
return any(n==sbol3.SO_CIRCULAR for n in obj.types)
def find_feature(doc: sbol3.Document, matching: Callable[[sbol3.Feature], bool]) -> Optional[sbol3.Feature]:
"""
Search for a feature in the given SBOL document that matches the condition specified by the `matching` callable.

:param doc: The SBOL document to search within.
:param matching: A callable that takes an sbol3.Feature as input and returns True if the feature matches the desired condition.
:return: The first sbol3.Feature that matches the condition, or None if no matching feature is found.
"""
for obj in doc.objects:
if isinstance(obj, sbol3.Component):
for feature in obj.features:
if matching(feature):
return feature
return None
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