[jira] [Commented] (FLINK-9927) Error in Python Stream API example on website

["Chesnay Schepler (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/FLINK-9927?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16553994#comment-16553994 ] 

Chesnay Schepler commented on FLINK-9927:
-----------------------------------------

the example should use  {{output()}} instead of {{print()}}.

> Error in Python Stream API example on website
> ---------------------------------------------
>
>                 Key: FLINK-9927
>                 URL: https://issues.apache.org/jira/browse/FLINK-9927
>             Project: Flink
>          Issue Type: Bug
>          Components: Documentation
>    Affects Versions: 1.6.0
>            Reporter: Joe Malt
>            Priority: Minor
>
> The [Python Programming Guide (Streaming) |https://ci.apache.org/projects/flink/flink-docs-master/dev/stream/python.html#program-skeleton]page contains a WordCount example with the following main method:
> {code:java}
> def main(factory):
>  env = factory.get_execution_environment()
>  env.create_python_source(Generator(num_iters=1000)) \
>  .flat_map(Tokenizer()) \
>  .key_by(Selector()) \
>  .time_window(milliseconds(50)) \
>  .reduce(Sum()) \
>  .print(){code}
> The print() should, [according to the documentation, be output()|https://ci.apache.org/projects/flink/flink-docs-release-1.6/api/java/org/apache/flink/streaming/python/api/datastream/PythonDataStream.html#output%E2%80%93]. Trying to call print() results in an error:
> {code:java}
> jmalt-machine:bin jmalt$ ./pyflink-stream.sh /Users/jmalt/flink-python/WordCount.py
> Starting execution of program
> Failed to run plan: null
> Traceback (most recent call last):
>  File "<string>", line 1, in <module>
>  File "/var/folders/t1/gcltcjcn5zdgqfqrc32xk90x85xkg9/T/flink_streaming_plan_9539e241-ba0a-42bf-9d4c-844dda26b998/WordCount.py", line 43, in main
> AttributeError: 'org.apache.flink.streaming.python.api.datastream.P' object has no attribute 'print'{code}



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