class_docstr: Interface specification for variable type instances.
  
  A :term:`Type` instance is mainly responsible for two things:
  
  - creating `Variable` instances (conventionally, `__call__` does this), and
  
  - filtering a value assigned to a `Variable` so that the value
    conforms to restrictions imposed by the type (also known as
    casting, this is done by `filter`).
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docstr: Convert a `other` into a `Variable` with a `Type` that's compatible with `self`.
  
  If the involved `Type`\s are not compatible, a `TypeError` will be raised.
docstr_tok: ["Convert","a","`","other","`","into","a","`","Variable","`","with","a","`","Type","`","that","'s","compatible","with","`","self","`",".","If","the","involved","`","Type","`","\\s","are","not","compatible",",","a","`","TypeError","`","will","be","raised","."]
code: def filter_variable(
      self, other: Union[Variable, D], allow_convert: bool = True
  ) -> variable_type:
      r"""Convert a `other` into a `Variable` with a `Type` that's compatible with `self`.
  
      If the involved `Type`\s are not compatible, a `TypeError` will be raised.
      """
      if not isinstance(other, Variable):
          # The value is not a Variable: we cast it into
          # a Constant of the appropriate Type.
          other = self.constant_type(type=self, data=other)
  
      if other.type != self and allow_convert:
          other2 = self.convert_variable(other)
          if other2 is not None:
              return other2
  
      if other.type != self:
          raise TypeError(
              f"Cannot convert Type {other.type} "
              f"(of Variable {other}) into Type {self}. "
              f"You can try to manually convert {other} into a {self}."
          )
      return other
  
imports: from abc import abstractmethod
  from typing import Any, Generic, Optional, TypeVar, Union
  from typing_extensions import TypeAlias
  from pytensor.graph import utils
  from pytensor.graph.basic import Constant, Variable
  from pytensor.graph.utils import MetaObject
label_desc: Use image node_id 5 for calling the Type obj's underlying member method code with example usage: obj.filter_variable(other, allow_convert) and returns: other, other2