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"""The standard `count` function extension."""
from __future__ import annotations
from typing import TYPE_CHECKING
from jsonpath.function_extensions import ExpressionType
from jsonpath.function_extensions import FilterFunction
if TYPE_CHECKING:
from jsonpath.match import NodeList
class Count(FilterFunction):
"""The built-in `count` function."""
arg_types = [ExpressionType.NODES]
return_type = ExpressionType.VALUE
def __call__(self, node_list: NodeList) -> int:
"""Return the number of nodes in the node list."""
return len(node_list)
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