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from __future__ import unicode_literals
from enum import Enum, unique
@unique
class CustomEntityParserUsage(Enum):
WITH_STEMS = 0
"""The parser is used with stemming"""
WITHOUT_STEMS = 1
"""The parser is used without stemming"""
WITH_AND_WITHOUT_STEMS = 2
"""The parser is used both with and without stemming"""
@classmethod
def merge_usages(cls, lhs_usage, rhs_usage):
if lhs_usage is None:
return rhs_usage
if rhs_usage is None:
return lhs_usage
if lhs_usage == rhs_usage:
return lhs_usage
return cls.WITH_AND_WITHOUT_STEMS
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