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


Joe Malt created FLINK-9927:
-------------------------------

             Summary: 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


The _Python Programming Guide (Streaming)_ 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–;]. 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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