Fokko commented on issue #38615:
URL: https://github.com/apache/arrow/issues/38615#issuecomment-1879251134
Still running into this. I would expect something like below to work:
```python
In [1]: import pyarrow as pa
In [2]: current_schema = pa.schema([
...: ^Ipa.field("x", pa.float32()),
...: ^Ipa.field("y", pa.float32())
...: ])
...:
...: tbl = pa.Table.from_pylist(
...: [
...: {"x": 52.371807, "y": 4.896029},
...: {"x": 52.387386, "y": 4.646219},
...: {"x": 52.078663, "y": 4.288788},
...: ],
...: schema=current_schema,
...: )
...:
...: schema_with_z = pa.schema(
...: [
...: ^I^Ipa.field("x", pa.float32()),
...: ^I^Ipa.field("y", pa.float32()),
...: pa.field("x", pa.float32()),
...: ]
...: )
...:
...: tbl.cast(schema_with_z)
---------------------------------------------------------------------------
ValueError Traceback (most recent call last)
Cell In[2], line 23
6 tbl = pa.Table.from_pylist(
7 [
8 {"x": 52.371807, "y": 4.896029},
(...)
12 schema=current_schema,
13 )
15 schema_with_z = pa.schema(
16 [
17 pa.field("x", pa.float32()),
(...)
20 ]
21 )
---> 23 tbl.cast(schema_with_z)
File /opt/homebrew/lib/python3.11/site-packages/pyarrow/table.pxi:3793, in
pyarrow.lib.Table.cast()
ValueError: Target schema's field names are not matching the table's field
names: ['x', 'y'], ['x', 'y', 'x']
```
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