zero323 commented on a change in pull request #30320:
URL: https://github.com/apache/spark/pull/30320#discussion_r520711729
##########
File path: python/pyspark/accumulators.py
##########
@@ -15,77 +15,6 @@
# limitations under the License.
#
-"""
->>> from pyspark.context import SparkContext
->>> sc = SparkContext('local', 'test')
->>> a = sc.accumulator(1)
->>> a.value
-1
->>> a.value = 2
->>> a.value
-2
->>> a += 5
->>> a.value
-7
-
->>> sc.accumulator(1.0).value
-1.0
-
->>> sc.accumulator(1j).value
-1j
-
->>> rdd = sc.parallelize([1,2,3])
->>> def f(x):
-... global a
-... a += x
->>> rdd.foreach(f)
->>> a.value
-13
-
->>> b = sc.accumulator(0)
->>> def g(x):
-... b.add(x)
->>> rdd.foreach(g)
->>> b.value
-6
-
->>> from pyspark.accumulators import AccumulatorParam
->>> class VectorAccumulatorParam(AccumulatorParam):
-... def zero(self, value):
-... return [0.0] * len(value)
-... def addInPlace(self, val1, val2):
-... for i in range(len(val1)):
-... val1[i] += val2[i]
-... return val1
->>> va = sc.accumulator([1.0, 2.0, 3.0], VectorAccumulatorParam())
->>> va.value
-[1.0, 2.0, 3.0]
->>> def g(x):
-... global va
-... va += [x] * 3
->>> rdd.foreach(g)
->>> va.value
-[7.0, 8.0, 9.0]
-
->>> rdd.map(lambda x: a.value).collect() # doctest: +IGNORE_EXCEPTION_DETAIL
-Traceback (most recent call last):
- ...
-Py4JJavaError:...
-
->>> def h(x):
-... global a
-... a.value = 7
->>> rdd.foreach(h) # doctest: +IGNORE_EXCEPTION_DETAIL
-Traceback (most recent call last):
- ...
-Py4JJavaError:...
-
->>> sc.accumulator([1.0, 2.0, 3.0]) # doctest: +IGNORE_EXCEPTION_DETAIL
-Traceback (most recent call last):
- ...
-TypeError:...
Review comment:
Moved into `Accumulator` / `AccumulatorParam` docstring, so it is
visible in the corresponding docs.
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