AlenkaF commented on code in PR #45818:
URL: https://github.com/apache/arrow/pull/45818#discussion_r2062918249
##########
python/pyarrow/scalar.pxi:
##########
@@ -1064,13 +1126,26 @@ cdef class MapScalar(ListScalar):
def __getitem__(self, i):
"""
- Return the value at the given index.
+ Return the value at the given index or key.
"""
+
arr = self.values
if arr is None:
- raise IndexError(i)
- dct = arr[_normalize_index(i, len(arr))]
- return (dct[self.type.key_field.name], dct[self.type.item_field.name])
+ raise IndexError(i) if isinstance(i, int) else KeyError(i)
+
+ key_field = self.type.key_field.name
+ item_field = self.type.item_field.name
+
+ if isinstance(i, int):
+ if arr is None:
+ raise IndexError(i)
+ dct = arr[_normalize_index(i, len(arr))]
+ return (dct[key_field], dct[item_field])
+ else:
+ for dct in arr:
+ if dct[key_field].as_py() == i:
+ return dct[item_field]
+ raise KeyError(i)
Review Comment:
This can also be removed, same as above.
##########
python/pyarrow/scalar.pxi:
##########
@@ -1064,13 +1126,26 @@ cdef class MapScalar(ListScalar):
def __getitem__(self, i):
"""
- Return the value at the given index.
+ Return the value at the given index or key.
"""
+
arr = self.values
if arr is None:
- raise IndexError(i)
- dct = arr[_normalize_index(i, len(arr))]
- return (dct[self.type.key_field.name], dct[self.type.item_field.name])
+ raise IndexError(i) if isinstance(i, int) else KeyError(i)
+
+ key_field = self.type.key_field.name
+ item_field = self.type.item_field.name
+
+ if isinstance(i, int):
+ if arr is None:
+ raise IndexError(i)
Review Comment:
I think this is not needed here anymore as it is already checked on line
1070/1133.
##########
python/pyarrow/scalar.pxi:
##########
@@ -847,6 +882,33 @@ cdef class BinaryScalar(Scalar):
buffer = self.as_buffer()
return None if buffer is None else buffer.to_pybytes()
+ def __bytes__(self):
+ return (self.as_py())
+
+ def __getbuffer__(self, cp.Py_buffer* buffer, int flags):
+ cdef Buffer buf = self.as_buffer()
+
+ if buf.buffer.get().is_mutable():
+ buffer.readonly = 0
+ else:
+ if flags & cp.PyBUF_WRITABLE:
+ raise BufferError("Writable buffer requested but Arrow "
+ "buffer was not mutable")
+ buffer.readonly = 1
+ buffer.buf = <char *>buf.buffer.get().data()
+ buffer.len = buf.size
+ if buffer.buf == NULL:
+ assert buffer.len == 0
+ buffer.buf = cp.PyBytes_AS_STRING(b"")
Review Comment:
Could we test this part also, maybe with something like `pa.scalar(None,
type=ty)`?
##########
docs/source/python/compute.rst:
##########
@@ -63,6 +63,21 @@ Below are a few simple examples::
>>> pc.multiply(x, y)
<pyarrow.DoubleScalar: 72.54>
+If you are using a compute function which returns more than one value, results
+will be returned as a StructScalar. You can extract the individual values by
Review Comment:
```suggestion
will be returned as a ``StructScalar``. You can extract the individual
values by
```
##########
docs/source/python/compute.rst:
##########
@@ -63,6 +63,21 @@ Below are a few simple examples::
>>> pc.multiply(x, y)
<pyarrow.DoubleScalar: 72.54>
+If you are using a compute function which returns more than one value, results
Review Comment:
❤️
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