jorisvandenbossche commented on issue #33592:
URL: https://github.com/apache/arrow/issues/33592#issuecomment-2018101751
Just ran into this as well:
```
>>> arr = pa.array([{'x': 1.0, 'y': 2.0}, {'x': 2.0, 'y': 3.0}])
>>> arr.type
StructType(struct<x: double, y: double>)
>>> arr.cast(pa.struct([pa.field("x", pa.float64(), nullable=False),
pa.field("y", pa.float64(), nullable=False)]))
...
ArrowTypeError: cannot cast nullable field to non-nullable field: struct<x:
double, y: double> struct<x: double not null, y: double not null>
/home/joris/scipy/repos/arrow/cpp/src/arrow/compute/exec.cc:920
kernel_->exec(kernel_ctx_, input, &output)
/home/joris/scipy/repos/arrow/cpp/src/arrow/compute/function.cc:277
executor->Execute(input, &listener)
```
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