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https://issues.apache.org/jira/browse/FLINK-16522?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17072854#comment-17072854
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Rong Rong commented on FLINK-16522:
-----------------------------------

Is this Jira referring to TypeChecking as well? 
[https://realpython.com/python-type-checking/] or just introducing Type Hints 
[https://www.python.org/dev/peps/pep-0484/] ?

with type checking/hints it might also help improvement the API documentations 
(not sure if there's any document auto-gen on Python side but at least now the 
function itself contains the Type Hints when looking them up)

IMO this is a great idea. +1 to have this implemented. 

> Use type hints to declare the signature of the methods
> ------------------------------------------------------
>
>                 Key: FLINK-16522
>                 URL: https://issues.apache.org/jira/browse/FLINK-16522
>             Project: Flink
>          Issue Type: Improvement
>          Components: API / Python
>            Reporter: Huang Xingbo
>            Assignee: Huang Xingbo
>            Priority: Major
>             Fix For: 1.11.0
>
>
> Type Hints was introduced in Python 3.5 and it would be great if we can 
> declare the signature of the methods using type hints.



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