7ff9d2e3ee
### What changes were proposed in this pull request? This PR proposes to rename Koalas to pandas-on-Spark in main codes ### Why are the changes needed? To have the correct name in PySpark. NOTE that the official name in the main documentation will be pandas APIs on Spark to be extra clear. pandas-on-Spark is not the official term. ### Does this PR introduce _any_ user-facing change? No, it's master-only change. It changes the docstring and class names. ### How was this patch tested? Manually tested via: ```bash ./python/run-tests --python-executable=python3 --modules pyspark-pandas ``` Closes #32166 from HyukjinKwon/rename-koalas. Authored-by: HyukjinKwon <gurwls223@apache.org> Signed-off-by: HyukjinKwon <gurwls223@apache.org>
241 lines
8.8 KiB
Python
241 lines
8.8 KiB
Python
#
|
|
# 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.
|
|
#
|
|
from collections import OrderedDict
|
|
from typing import Callable, Any
|
|
|
|
import numpy as np
|
|
from pyspark.sql import functions as F, Column
|
|
from pyspark.sql.types import DoubleType, LongType, BooleanType
|
|
|
|
|
|
unary_np_spark_mappings = OrderedDict(
|
|
{
|
|
"abs": F.abs,
|
|
"absolute": F.abs,
|
|
"arccos": F.acos,
|
|
"arccosh": F.pandas_udf(lambda s: np.arccosh(s), DoubleType()),
|
|
"arcsin": F.asin,
|
|
"arcsinh": F.pandas_udf(lambda s: np.arcsinh(s), DoubleType()),
|
|
"arctan": F.atan,
|
|
"arctanh": F.pandas_udf(lambda s: np.arctanh(s), DoubleType()),
|
|
"bitwise_not": F.bitwiseNOT,
|
|
"cbrt": F.cbrt,
|
|
"ceil": F.ceil,
|
|
# It requires complex type which pandas-on-Spark does not support yet
|
|
"conj": lambda _: NotImplemented,
|
|
"conjugate": lambda _: NotImplemented, # It requires complex type
|
|
"cos": F.cos,
|
|
"cosh": F.pandas_udf(lambda s: np.cosh(s), DoubleType()),
|
|
"deg2rad": F.pandas_udf(lambda s: np.deg2rad(s), DoubleType()),
|
|
"degrees": F.degrees,
|
|
"exp": F.exp,
|
|
"exp2": F.pandas_udf(lambda s: np.exp2(s), DoubleType()),
|
|
"expm1": F.expm1,
|
|
"fabs": F.pandas_udf(lambda s: np.fabs(s), DoubleType()),
|
|
"floor": F.floor,
|
|
"frexp": lambda _: NotImplemented, # 'frexp' output lengths become different
|
|
# and it cannot be supported via pandas UDF.
|
|
"invert": F.pandas_udf(lambda s: np.invert(s), DoubleType()),
|
|
"isfinite": lambda c: c != float("inf"),
|
|
"isinf": lambda c: c == float("inf"),
|
|
"isnan": F.isnan,
|
|
"isnat": lambda c: NotImplemented, # pandas-on-Spark and PySpark does not have Nat concept.
|
|
"log": F.log,
|
|
"log10": F.log10,
|
|
"log1p": F.log1p,
|
|
"log2": F.pandas_udf(lambda s: np.log2(s), DoubleType()),
|
|
"logical_not": lambda c: ~(c.cast(BooleanType())),
|
|
"matmul": lambda _: NotImplemented, # Can return a NumPy array in pandas.
|
|
"negative": lambda c: c * -1,
|
|
"positive": lambda c: c,
|
|
"rad2deg": F.pandas_udf(lambda s: np.rad2deg(s), DoubleType()),
|
|
"radians": F.radians,
|
|
"reciprocal": F.pandas_udf(lambda s: np.reciprocal(s), DoubleType()),
|
|
"rint": F.pandas_udf(lambda s: np.rint(s), DoubleType()),
|
|
"sign": lambda c: F.when(c == 0, 0).when(c < 0, -1).otherwise(1),
|
|
"signbit": lambda c: F.when(c < 0, True).otherwise(False),
|
|
"sin": F.sin,
|
|
"sinh": F.pandas_udf(lambda s: np.sinh(s), DoubleType()),
|
|
"spacing": F.pandas_udf(lambda s: np.spacing(s), DoubleType()),
|
|
"sqrt": F.sqrt,
|
|
"square": F.pandas_udf(lambda s: np.square(s), DoubleType()),
|
|
"tan": F.tan,
|
|
"tanh": F.pandas_udf(lambda s: np.tanh(s), DoubleType()),
|
|
"trunc": F.pandas_udf(lambda s: np.trunc(s), DoubleType()),
|
|
}
|
|
)
|
|
|
|
binary_np_spark_mappings = OrderedDict(
|
|
{
|
|
"arctan2": F.atan2,
|
|
"bitwise_and": lambda c1, c2: c1.bitwiseAND(c2),
|
|
"bitwise_or": lambda c1, c2: c1.bitwiseOR(c2),
|
|
"bitwise_xor": lambda c1, c2: c1.bitwiseXOR(c2),
|
|
"copysign": F.pandas_udf(lambda s1, s2: np.copysign(s1, s2), DoubleType()),
|
|
"float_power": F.pandas_udf(lambda s1, s2: np.float_power(s1, s2), DoubleType()),
|
|
"floor_divide": F.pandas_udf(lambda s1, s2: np.floor_divide(s1, s2), DoubleType()),
|
|
"fmax": F.pandas_udf(lambda s1, s2: np.fmax(s1, s2), DoubleType()),
|
|
"fmin": F.pandas_udf(lambda s1, s2: np.fmin(s1, s2), DoubleType()),
|
|
"fmod": F.pandas_udf(lambda s1, s2: np.fmod(s1, s2), DoubleType()),
|
|
"gcd": F.pandas_udf(lambda s1, s2: np.gcd(s1, s2), DoubleType()),
|
|
"heaviside": F.pandas_udf(lambda s1, s2: np.heaviside(s1, s2), DoubleType()),
|
|
"hypot": F.hypot,
|
|
"lcm": F.pandas_udf(lambda s1, s2: np.lcm(s1, s2), DoubleType()),
|
|
"ldexp": F.pandas_udf(lambda s1, s2: np.ldexp(s1, s2), DoubleType()),
|
|
"left_shift": F.pandas_udf(lambda s1, s2: np.left_shift(s1, s2), LongType()),
|
|
"logaddexp": F.pandas_udf(lambda s1, s2: np.logaddexp(s1, s2), DoubleType()),
|
|
"logaddexp2": F.pandas_udf(lambda s1, s2: np.logaddexp2(s1, s2), DoubleType()),
|
|
"logical_and": lambda c1, c2: c1.cast(BooleanType()) & c2.cast(BooleanType()),
|
|
"logical_or": lambda c1, c2: c1.cast(BooleanType()) | c2.cast(BooleanType()),
|
|
"logical_xor": lambda c1, c2: (
|
|
# mimics xor by logical operators.
|
|
(c1.cast(BooleanType()) | c2.cast(BooleanType()))
|
|
& (~(c1.cast(BooleanType())) | ~(c2.cast(BooleanType())))
|
|
),
|
|
"maximum": F.greatest,
|
|
"minimum": F.least,
|
|
"modf": F.pandas_udf(lambda s1, s2: np.modf(s1, s2), DoubleType()),
|
|
"nextafter": F.pandas_udf(lambda s1, s2: np.nextafter(s1, s2), DoubleType()),
|
|
"right_shift": F.pandas_udf(lambda s1, s2: np.right_shift(s1, s2), LongType()),
|
|
}
|
|
)
|
|
|
|
|
|
# Copied from pandas.
|
|
# See also https://docs.scipy.org/doc/numpy/reference/arrays.classes.html#standard-array-subclasses
|
|
def maybe_dispatch_ufunc_to_dunder_op(
|
|
ser_or_index, ufunc: Callable, method: str, *inputs, **kwargs: Any
|
|
):
|
|
special = {
|
|
"add",
|
|
"sub",
|
|
"mul",
|
|
"pow",
|
|
"mod",
|
|
"floordiv",
|
|
"truediv",
|
|
"divmod",
|
|
"eq",
|
|
"ne",
|
|
"lt",
|
|
"gt",
|
|
"le",
|
|
"ge",
|
|
"remainder",
|
|
"matmul",
|
|
}
|
|
aliases = {
|
|
"absolute": "abs",
|
|
"multiply": "mul",
|
|
"floor_divide": "floordiv",
|
|
"true_divide": "truediv",
|
|
"power": "pow",
|
|
"remainder": "mod",
|
|
"divide": "div",
|
|
"equal": "eq",
|
|
"not_equal": "ne",
|
|
"less": "lt",
|
|
"less_equal": "le",
|
|
"greater": "gt",
|
|
"greater_equal": "ge",
|
|
}
|
|
|
|
# For op(., Array) -> Array.__r{op}__
|
|
flipped = {
|
|
"lt": "__gt__",
|
|
"le": "__ge__",
|
|
"gt": "__lt__",
|
|
"ge": "__le__",
|
|
"eq": "__eq__",
|
|
"ne": "__ne__",
|
|
}
|
|
|
|
op_name = ufunc.__name__
|
|
op_name = aliases.get(op_name, op_name)
|
|
|
|
def not_implemented(*args, **kwargs):
|
|
return NotImplemented
|
|
|
|
if method == "__call__" and op_name in special and kwargs.get("out") is None:
|
|
if isinstance(inputs[0], type(ser_or_index)):
|
|
name = "__{}__".format(op_name)
|
|
return getattr(ser_or_index, name, not_implemented)(inputs[1])
|
|
else:
|
|
name = flipped.get(op_name, "__r{}__".format(op_name))
|
|
return getattr(ser_or_index, name, not_implemented)(inputs[0])
|
|
else:
|
|
return NotImplemented
|
|
|
|
|
|
# See also https://docs.scipy.org/doc/numpy/reference/arrays.classes.html#standard-array-subclasses
|
|
def maybe_dispatch_ufunc_to_spark_func(
|
|
ser_or_index, ufunc: Callable, method: str, *inputs, **kwargs: Any
|
|
):
|
|
from pyspark.pandas.base import column_op
|
|
|
|
op_name = ufunc.__name__
|
|
|
|
if (
|
|
method == "__call__"
|
|
and (op_name in unary_np_spark_mappings or op_name in binary_np_spark_mappings)
|
|
and kwargs.get("out") is None
|
|
):
|
|
|
|
np_spark_map_func = unary_np_spark_mappings.get(op_name) or binary_np_spark_mappings.get(
|
|
op_name
|
|
)
|
|
|
|
def convert_arguments(*args):
|
|
args = [ # type: ignore
|
|
F.lit(inp) if not isinstance(inp, Column) else inp for inp in args
|
|
] # type: ignore
|
|
return np_spark_map_func(*args)
|
|
|
|
return column_op(convert_arguments)(*inputs) # type: ignore
|
|
else:
|
|
return NotImplemented
|
|
|
|
|
|
def _test():
|
|
import os
|
|
import doctest
|
|
import sys
|
|
from pyspark.sql import SparkSession
|
|
import pyspark.pandas.numpy_compat
|
|
|
|
os.chdir(os.environ["SPARK_HOME"])
|
|
|
|
globs = pyspark.pandas.numpy_compat.__dict__.copy()
|
|
globs["ps"] = pyspark.pandas
|
|
spark = (
|
|
SparkSession.builder.master("local[4]")
|
|
.appName("pyspark.pandas.numpy_compat tests")
|
|
.getOrCreate()
|
|
)
|
|
(failure_count, test_count) = doctest.testmod(
|
|
pyspark.pandas.numpy_compat,
|
|
globs=globs,
|
|
optionflags=doctest.ELLIPSIS | doctest.NORMALIZE_WHITESPACE,
|
|
)
|
|
spark.stop()
|
|
if failure_count:
|
|
sys.exit(-1)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
_test()
|