jorisvandenbossche commented on a change in pull request #10591:
URL: https://github.com/apache/arrow/pull/10591#discussion_r660380916
##########
File path: python/pyarrow/scalar.pxi
##########
@@ -652,21 +649,42 @@ cdef class StructScalar(Scalar, collections.abc.Mapping):
try:
return Scalar.wrap(GetResultValue(sp.field(ref)))
- except ArrowInvalid:
+ except ArrowInvalid as exc:
if isinstance(key, int):
- raise IndexError(key)
+ raise IndexError(key) from exc
else:
- raise KeyError(key)
+ raise KeyError(key) from exc
def as_py(self):
"""
Return this value as a Python dict.
"""
if self.is_valid:
- return {k: v.as_py() for k, v in self.items()}
+ try:
+ return {k: self[k].as_py() for k in self.keys()}
Review comment:
`self.items()` (currently) returns tuples with pyarrow scalars, not
python scalars (so it could also be `{k: v.as_py() for k, v in self.items()}`)
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