zhengruifeng commented on code in PR #39068:
URL: https://github.com/apache/spark/pull/39068#discussion_r1052021125
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python/pyspark/sql/connect/functions.py:
##########
@@ -80,6 +84,78 @@ def _invoke_binary_math_function(name: str, col1: Any, col2:
Any) -> Column:
return _invoke_function(name, *_cols)
+def _get_lambda_parameters(f: Callable) -> ValuesView[inspect.Parameter]:
+ signature = inspect.signature(f)
+ parameters = signature.parameters.values()
+
+ # We should exclude functions that use, variable args and keyword argument
+ # names, as well as keyword only args.
+ supported_parameter_types = {
+ inspect.Parameter.POSITIONAL_OR_KEYWORD,
+ inspect.Parameter.POSITIONAL_ONLY,
+ }
+
+ # Validate that the function arity is between 1 and 3.
+ if not (1 <= len(parameters) <= 3):
+ raise ValueError(
Review Comment:
@cloud-fan Here is the validation on number of paramters
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