xinrong-meng commented on code in PR #37635:
URL: https://github.com/apache/spark/pull/37635#discussion_r962400610
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python/pyspark/sql/types.py:
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@@ -2268,12 +2268,40 @@ def convert(self, obj: "np.generic", gateway_client:
GatewayClient) -> Any:
return obj.item()
+class NumpyArrayConverter:
+ def can_convert(self, obj: Any) -> bool:
+ return has_numpy and isinstance(obj, np.ndarray)
+
+ def convert(self, obj: "np.ndarray", gateway_client: GatewayClient) ->
JavaObject:
+ from pyspark import SparkContext
+
+ gateway = SparkContext._gateway
+ assert gateway is not None
+
+ plist = obj.tolist()
+ # np.array([]).dtype is dtype('float64') so set float for empty plist
+ ptpe = type(plist[0]) if len(plist) > 0 else float
+ tpe_dict = {
+ int: gateway.jvm.int,
Review Comment:
Makes sense!
One limitation is `np.dtype("int8")` cann't be mapped to `gateway.jvm.byte`,
create `jarr` accordingly and then do the per-element assignment.
`TypeError: 'bytes' object does not support item assignment` is caused in
`jarr[i] = plist[i]`.
So both `int8` and `int16` are mapped to `gateway.jvm.short`.
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