class_docstr: A predicate used to aggregate other predicates using any reduce logical operation.
class_docstr_tok: ["A","predicate","used","to","aggregate","other","predicates","using","any","reduce","logical","operation","."]
code: def get_fields(self):
      fields = set()
      for p in self._predicate_list:
          fields |= p.get_fields()
      return fields
  
imports: import abc
  import collections.abc
  import hashlib
  import numpy
  import six
  import sys
label_desc: Use image node_id 2 for calling the in_reduce obj's underlying member method code with example usage: obj.get_fields() and returns: fields