CODEWITHSUNDEEP
pythonapache-pig
invo007
invo007

Reputation: 69

python udf error in pig

I am trying to run below python udf in Pig 

@outputSchema("word:chararray")
def get(s):
    out = s.lower()
    return out;

I am getting below error : 

  File "/home/test.py", line 3, in get
    out = s.lower()
AttributeError: 'NoneType' object has no attribute 'lower'

Upvotes: 1

Views: 362

Answers (1)

Dair
Dair

Reputation: 16240

You should handle the case when s is none. In most of the examples such as:

from pig_util import outputSchema

@outputSchema('decade:chararray')
def decade(year):
    """
    Get the decade, given a year.

    e.g. for 1998 -> '1990s'
    """
    try:
        base_decade_year = int(year) - (int(year) % 10)
        decade_str = '%ss' % base_decade_year
        print 'input year: %s, decade: %s' % (year, decade_str)
        return decade_str
    except ValueError:
        return None

You need to handle the case when the value is None. So, one possible fix would be to try:

@outputSchema("word:chararray")
def get(s):
    if s is None:
        return None
    return str(s).lower()

Upvotes: 2

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