ec1adecbb7
Using Sphinx to generate API docs for PySpark.
requirement: Sphinx
```
$ cd python/docs/
$ make html
```
The generated API docs will be located at python/docs/_build/html/index.html
It can co-exists with those generated by Epydoc.
This is the first working version, after merging in, then we can continue to improve it and replace the epydoc finally.
Author: Davies Liu <davies.liu@gmail.com>
Closes #2292 from davies/sphinx and squashes the following commits:
425a3b1
[Davies Liu] cleanup
1573298 [Davies Liu] move docs to python/docs/
5fe3903 [Davies Liu] Merge branch 'master' into sphinx
9468ab0 [Davies Liu] fix makefile
b408f38 [Davies Liu] address all comments
e2ccb1b [Davies Liu] update name and version
9081ead [Davies Liu] generate PySpark API docs using Sphinx
95 lines
2.8 KiB
Python
95 lines
2.8 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 pyspark.context import SparkContext
|
|
>>> sc = SparkContext('local', 'test')
|
|
>>> b = sc.broadcast([1, 2, 3, 4, 5])
|
|
>>> b.value
|
|
[1, 2, 3, 4, 5]
|
|
>>> sc.parallelize([0, 0]).flatMap(lambda x: b.value).collect()
|
|
[1, 2, 3, 4, 5, 1, 2, 3, 4, 5]
|
|
>>> b.unpersist()
|
|
|
|
>>> large_broadcast = sc.broadcast(list(range(10000)))
|
|
"""
|
|
import os
|
|
|
|
from pyspark.serializers import CompressedSerializer, PickleSerializer
|
|
|
|
|
|
__all__ = ['Broadcast']
|
|
|
|
|
|
# Holds broadcasted data received from Java, keyed by its id.
|
|
_broadcastRegistry = {}
|
|
|
|
|
|
def _from_id(bid):
|
|
from pyspark.broadcast import _broadcastRegistry
|
|
if bid not in _broadcastRegistry:
|
|
raise Exception("Broadcast variable '%s' not loaded!" % bid)
|
|
return _broadcastRegistry[bid]
|
|
|
|
|
|
class Broadcast(object):
|
|
|
|
"""
|
|
A broadcast variable created with
|
|
L{SparkContext.broadcast()<pyspark.context.SparkContext.broadcast>}.
|
|
Access its value through C{.value}.
|
|
"""
|
|
|
|
def __init__(self, bid, value, java_broadcast=None,
|
|
pickle_registry=None, path=None):
|
|
"""
|
|
Should not be called directly by users -- use
|
|
L{SparkContext.broadcast()<pyspark.context.SparkContext.broadcast>}
|
|
instead.
|
|
"""
|
|
self.bid = bid
|
|
if path is None:
|
|
self._value = value
|
|
self._jbroadcast = java_broadcast
|
|
self._pickle_registry = pickle_registry
|
|
self.path = path
|
|
|
|
@property
|
|
def value(self):
|
|
""" Return the broadcasted value
|
|
"""
|
|
if not hasattr(self, "_value") and self.path is not None:
|
|
ser = CompressedSerializer(PickleSerializer())
|
|
self._value = ser.load_stream(open(self.path)).next()
|
|
return self._value
|
|
|
|
def unpersist(self, blocking=False):
|
|
"""
|
|
Delete cached copies of this broadcast on the executors.
|
|
"""
|
|
self._jbroadcast.unpersist(blocking)
|
|
os.unlink(self.path)
|
|
|
|
def __reduce__(self):
|
|
self._pickle_registry.add(self)
|
|
return (_from_id, (self.bid, ))
|
|
|
|
|
|
if __name__ == "__main__":
|
|
import doctest
|
|
doctest.testmod()
|