cc2fcb4794
### What changes were proposed in this pull request?
This PR adds the support of understanding `numpy.typing` package that's added from NumPy 1.21.
### Why are the changes needed?
For user-friendly return type specification in type hints for function apply APIs in pandas API on Spark.
### Does this PR introduce _any_ user-facing change?
Yes, this PR will enable users to specify return type as `numpy.typing.NDArray[...]` to internally specify pandas UDF's return type.
For example,
```python
import pandas as pd
import pyspark.pandas as ps
pdf = pd.DataFrame(
{"a": [1, 2, 3, 4, 5, 6, 7, 8, 9], "b": [[e] for e in [4, 5, 6, 3, 2, 1, 0, 0, 0]]},
index=np.random.rand(9),
)
psdf = ps.from_pandas(pdf)
def func(x) -> ps.DataFrame[float, [int, ntp.NDArray[int]]]:
return x
psdf.pandas_on_spark.apply_batch(func)
```
### How was this patch tested?
Unittest and e2e tests were added.
Closes #34028 from HyukjinKwon/SPARK-36708.
Authored-by: Hyukjin Kwon <gurwls223@apache.org>
Signed-off-by: Hyukjin Kwon <gurwls223@apache.org>
|
||
|---|---|---|
| .. | ||
| docs | ||
| lib | ||
| pyspark | ||
| test_coverage | ||
| test_support | ||
| .coveragerc | ||
| .gitignore | ||
| MANIFEST.in | ||
| mypy.ini | ||
| pylintrc | ||
| README.md | ||
| run-tests | ||
| run-tests-with-coverage | ||
| run-tests.py | ||
| setup.cfg | ||
| setup.py | ||
Apache Spark
Spark is a unified analytics engine for large-scale data processing. It provides high-level APIs in Scala, Java, Python, and R, and an optimized engine that supports general computation graphs for data analysis. It also supports a rich set of higher-level tools including Spark SQL for SQL and DataFrames, pandas API on Spark for pandas workloads, MLlib for machine learning, GraphX for graph processing, and Structured Streaming for stream processing.
Online Documentation
You can find the latest Spark documentation, including a programming guide, on the project web page
Python Packaging
This README file only contains basic information related to pip installed PySpark. This packaging is currently experimental and may change in future versions (although we will do our best to keep compatibility). Using PySpark requires the Spark JARs, and if you are building this from source please see the builder instructions at "Building Spark".
The Python packaging for Spark is not intended to replace all of the other use cases. This Python packaged version of Spark is suitable for interacting with an existing cluster (be it Spark standalone, YARN, or Mesos) - but does not contain the tools required to set up your own standalone Spark cluster. You can download the full version of Spark from the Apache Spark downloads page.
NOTE: If you are using this with a Spark standalone cluster you must ensure that the version (including minor version) matches or you may experience odd errors.
Python Requirements
At its core PySpark depends on Py4J, but some additional sub-packages have their own extra requirements for some features (including numpy, pandas, and pyarrow). See also Dependencies for production, and dev/requirements.txt for development.