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Posted to user@pig.apache.org by Norbert Burger <no...@gmail.com> on 2011/07/26 16:21:29 UTC

return dict from Python UDF?

Hi all - I'm having some difficulty returning a dict/map from a Python UDF.
The following code returns "java.lang.String cannot be cast to
org.python.core.PyObject".  What am I missing?

Thanks,
Norbert

Here's my test Pig script:

REGISTER 'pigfuncs.py' USING jython AS pigfuncs;
cvps = LOAD 'test.txt' USING PigStorage();

A = FOREACH cvps GENERATE pigfuncs.createmap() as dict;
B = FOREACH A GENERATE dict#'asdf';
dump B;

And the Python UDF:

@outputSchema("m:map[]")
def createmap():
        d = {}
        d['asdf'] = '1234'
        d['qwer'] = '5678'
        return d