because it still goes through the Java API that requires some kind of type information. imagine a java api program where you omit all generic types, it just wouldn't work as of now.

On 30.07.2015 21:17, Gyula Fóra wrote:
Hey!

Could anyone briefly tell me what exactly is the reason why we force the
users in the Python API to declare types for operators?

I don't really understand how this works in different systems but I am just
curious why Flink has types and why Spark doesn't for instance.

If you give me some pointers to read that would also be fine :)

Thank you,
Gyula


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