xinrong-meng commented on code in PR #37635:
URL: https://github.com/apache/spark/pull/37635#discussion_r954103989
##########
python/pyspark/sql/types.py:
##########
@@ -2256,11 +2260,47 @@ def convert(self, obj: datetime.timedelta,
gateway_client: GatewayClient) -> Jav
)
+class NumpyScalarConverter:
+ def can_convert(self, obj: Any) -> bool:
+ return has_numpy and isinstance(obj, np.generic)
+
+ 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()
+ ptpe = type(plist[0]) if len(plist) > 0 else float
+ tpe_dict = {
+ int: gateway.jvm.int,
+ float: gateway.jvm.double,
+ bool: gateway.jvm.boolean,
+ str: gateway.jvm.String,
+ }
+ jarr = gateway.new_array(tpe_dict[ptpe], len(plist))
+ for i in range(len(plist)):
+ jarr[i] = plist[i]
+ return jarr
+
+
# datetime is a subclass of date, we should register DatetimeConverter first
register_input_converter(DatetimeNTZConverter())
register_input_converter(DatetimeConverter())
register_input_converter(DateConverter())
register_input_converter(DayTimeIntervalTypeConverter())
+register_input_converter(NumpyScalarConverter())
+# NumPy array satisfies py4j.java_collections.ListConverter,
+# so prepend NumpyArrayConverter
+register_input_converter(NumpyArrayConverter(), prepend=True)
Review Comment:
```py
>>> from py4j.java_collections import ListConverter
>>> ndarr = np.array([1, 2])
>>> ListConverter().can_convert(ndarr)
True
```
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