Expr

class langchain_core.structured_query.Expr

Bases: BaseModel

Base class for all expressions.

Create a new model by parsing and validating input data from keyword arguments.

Raises [ValidationError][pydantic_core.ValidationError] if the input data cannot be validated to form a valid model.

self is explicitly positional-only to allow self as a field name.

accept(visitor: Visitor) → Any

Accept a visitor.

Parameters:

visitor (Visitor) – visitor to accept.

Returns:

result of visiting.

Return type:

Any