pitrou commented on code in PR #12590: URL: https://github.com/apache/arrow/pull/12590#discussion_r858851288
########## python/pyarrow/tests/test_udf.py: ########## @@ -0,0 +1,483 @@ +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. + + +import pytest + +import pyarrow as pa +from pyarrow import compute as pc +import random + +# UDFs are all tested with a dataset scan +pytestmark = pytest.mark.dataset + + +try: + import pyarrow.dataset as ds +except ImportError: + ds = None + + [email protected](scope="session") +def mock_udf_context(): + # The batch_length is 1 for nullary functions. + # batch_length=1 since the udf expected output + # is generated by calling the udf function external + # to the call_function framework. + from pyarrow._compute import _get_scalar_udf_context + return _get_scalar_udf_context(pa.default_memory_pool(), 1) + + [email protected](scope="session") +def unary_func_fixture(): + def unary_function(ctx, scalar1): + return pc.call_function("add", [scalar1, 1]) + func_name = "y=x+k" + unary_doc = {"summary": "add function", + "description": "test add function"} + pc.register_scalar_function(unary_function, + func_name, + unary_doc, + {"array": pa.int64()}, + pa.int64()) + return unary_function, func_name + + [email protected](scope="session") +def binary_func_fixture(): + def binary_function(ctx, m, x): + return pc.call_function("multiply", [m, x]) + func_name = "y=mx" + binary_doc = {"summary": "y=mx", + "description": "find y from y = mx"} + pc.register_scalar_function(binary_function, + func_name, + binary_doc, + {"m": pa.int64(), + "x": pa.int64(), + }, + pa.int64()) + return binary_function, func_name + + [email protected](scope="session") +def ternary_func_fixture(): + def ternary_function(ctx, m, x, c): + mx = pc.call_function("multiply", [m, x]) + return pc.call_function("add", [mx, c]) + ternary_doc = {"summary": "y=mx+c", + "description": "find y from y = mx + c"} + func_name = "y=mx+c" + pc.register_scalar_function(ternary_function, + func_name, + ternary_doc, + { + "array1": pa.int64(), + "array2": pa.int64(), + "array3": pa.int64(), + }, + pa.int64()) + return ternary_function, func_name + + [email protected](scope="session") +def varargs_func_fixture(): + def varargs_function(ctx, *values): + base_val = values[:2] + res = pc.call_function("add", base_val) + for other_val in values[2:]: + res = pc.call_function("add", [res, other_val]) + return res + func_name = "z=ax+by+c" + varargs_doc = {"summary": "z=ax+by+c", + "description": "find z from z = ax + by + c" + } + pc.register_scalar_function(varargs_function, + func_name, + varargs_doc, + { + "array1": pa.int64(), + "array2": pa.int64(), + "array3": pa.int64(), + "array4": pa.int64(), + "array5": pa.int64(), + }, + pa.int64()) + return varargs_function, func_name + + [email protected](scope="session") +def random_with_udf_ctx_func_fixture(): + def random_with_udf_ctx(context, one, two): + proxy_pool = pa.proxy_memory_pool(context.memory_pool) + ans = pc.add(one, two, memory_pool=proxy_pool) + res = pa.array([ans.as_py()], memory_pool=proxy_pool) + return res + in_types = {"one": pa.int64(), + "two": pa.int64(), + } + func_doc = { + "summary": "test udf context", + "description": "udf context test" + } + func_name = "test_udf_context" + pc.register_scalar_function(random_with_udf_ctx, + func_name, func_doc, + in_types, + pa.int64()) + return random_with_udf_ctx, func_name + + +def const_return(ctx, scalar): + return 42 + + [email protected](scope="session") +def output_check_func_fixture(): + def output_check(ctx, array): + ar = pc.call_function("add", [array, 1]) + ar = ar.cast(pa.int32()) + return ar + func_name = "test_output_value" + in_types = {"array": pa.int64()} + out_type = pa.int64() + doc = { + "summary": "add function scalar", + "description": "add function" + } + pc.register_scalar_function(output_check, func_name, doc, + in_types, out_type) + return output_check, func_name + + [email protected](scope="session") +def nullary_check_func_fixture(): + # this needs to return array values + def nullary_check(ctx): + rand_vals = [] + print("batch_length: ", ctx.batch_length) + for _ in range(ctx.batch_length): + random.seed(10) + rand_vals.append(random.randint(0, 10)) Review Comment: Then why use the `random` module at all? You could just do something like: ```python def my_function(context): return pa.array([42] * context.batch_length, type=pa.int64(), memory_pool=context.memory_pool) ``` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
