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from collections.abc import Hashable
from typing import Any
class PintExceptionGroup(ExceptionGroup, ValueError):
"""Exception group for errors related to unit operations
Raised whenever there's the possibility of multiple errors.
"""
pass
def _add_note(e: Exception, note: str) -> Exception:
e.add_note(note)
return e
def create_exception_group(mapping: dict[Hashable, Any], op: str) -> ExceptionGroup:
match op:
case "attach":
message = "Cannot attach units"
errors = [
_add_note(e, f"cannot attach units to variable {key!r}: {unit}")
for key, (unit, e) in mapping.items()
]
case "parse":
message = "Cannot parse units"
errors = [
_add_note(e, f"invalid units for variable {key!r}: {unit} ({type})")
for key, (unit, type, e) in mapping.items()
]
case "convert":
message = "Cannot convert variables"
errors = [
_add_note(e, f"incompatible units for variable {key!r}")
for key, e in mapping.items()
]
case "convert_indexers":
message = "Cannot convert indexers"
errors = [
_add_note(e, f"incompatible units for indexer for {key!r}")
for key, e in mapping.items()
]
case _: # pragma: no cover
raise ValueError("invalid op")
return PintExceptionGroup(message, errors)
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