219 lines
6.8 KiB
Python
219 lines
6.8 KiB
Python
from __future__ import annotations
|
|
|
|
import ast
|
|
import inspect
|
|
import re
|
|
import textwrap
|
|
from collections.abc import Callable
|
|
from typing import Any
|
|
|
|
from langchain_core.runnables import Runnable, RunnableLambda, RunnableSequence
|
|
from langgraph.checkpoint.base import ChannelVersions
|
|
from typing_extensions import override
|
|
|
|
from langgraph._internal._runnable import RunnableCallable, RunnableSeq
|
|
from langgraph.pregel.protocol import PregelProtocol
|
|
|
|
|
|
def get_new_channel_versions(
|
|
previous_versions: ChannelVersions, current_versions: ChannelVersions
|
|
) -> ChannelVersions:
|
|
"""Get subset of current_versions that are newer than previous_versions."""
|
|
if previous_versions:
|
|
version_type = type(next(iter(current_versions.values()), None))
|
|
null_version = version_type() # type: ignore[misc]
|
|
new_versions = {
|
|
k: v
|
|
for k, v in current_versions.items()
|
|
if v > previous_versions.get(k, null_version) # type: ignore[operator]
|
|
}
|
|
else:
|
|
new_versions = current_versions
|
|
|
|
return new_versions
|
|
|
|
|
|
def find_subgraph_pregel(candidate: Runnable) -> PregelProtocol | None:
|
|
from langgraph.pregel import Pregel
|
|
|
|
candidates: list[Runnable] = [candidate]
|
|
|
|
for c in candidates:
|
|
if (
|
|
isinstance(c, PregelProtocol)
|
|
# subgraphs that disabled checkpointing are not considered
|
|
and (not isinstance(c, Pregel) or c.checkpointer is not False)
|
|
):
|
|
return c
|
|
elif isinstance(c, RunnableSequence) or isinstance(c, RunnableSeq):
|
|
candidates.extend(c.steps)
|
|
elif isinstance(c, RunnableLambda):
|
|
candidates.extend(c.deps)
|
|
elif isinstance(c, RunnableCallable):
|
|
if c.func is not None:
|
|
candidates.extend(
|
|
nl.__self__ if hasattr(nl, "__self__") else nl
|
|
for nl in get_function_nonlocals(c.func)
|
|
)
|
|
elif c.afunc is not None:
|
|
candidates.extend(
|
|
nl.__self__ if hasattr(nl, "__self__") else nl
|
|
for nl in get_function_nonlocals(c.afunc)
|
|
)
|
|
|
|
return None
|
|
|
|
|
|
def get_function_nonlocals(func: Callable) -> list[Any]:
|
|
"""Get the nonlocal variables accessed by a function.
|
|
|
|
Args:
|
|
func: The function to check.
|
|
|
|
Returns:
|
|
List[Any]: The nonlocal variables accessed by the function.
|
|
"""
|
|
try:
|
|
code = inspect.getsource(func)
|
|
tree = ast.parse(textwrap.dedent(code))
|
|
visitor = FunctionNonLocals()
|
|
visitor.visit(tree)
|
|
values: list[Any] = []
|
|
closure = (
|
|
inspect.getclosurevars(func.__wrapped__)
|
|
if hasattr(func, "__wrapped__") and callable(func.__wrapped__)
|
|
else inspect.getclosurevars(func)
|
|
)
|
|
candidates = {**closure.globals, **closure.nonlocals}
|
|
for k, v in candidates.items():
|
|
if k in visitor.nonlocals:
|
|
values.append(v)
|
|
for kk in visitor.nonlocals:
|
|
if "." in kk and kk.startswith(k):
|
|
vv = v
|
|
for part in kk.split(".")[1:]:
|
|
if vv is None:
|
|
break
|
|
else:
|
|
try:
|
|
vv = getattr(vv, part)
|
|
except AttributeError:
|
|
break
|
|
else:
|
|
values.append(vv)
|
|
except (SyntaxError, TypeError, OSError, SystemError):
|
|
return []
|
|
|
|
return values
|
|
|
|
|
|
class FunctionNonLocals(ast.NodeVisitor):
|
|
"""Get the nonlocal variables accessed of a function."""
|
|
|
|
def __init__(self) -> None:
|
|
self.nonlocals: set[str] = set()
|
|
|
|
@override
|
|
def visit_FunctionDef(self, node: ast.FunctionDef) -> Any:
|
|
"""Visit a function definition.
|
|
|
|
Args:
|
|
node: The node to visit.
|
|
|
|
Returns:
|
|
Any: The result of the visit.
|
|
"""
|
|
visitor = NonLocals()
|
|
visitor.visit(node)
|
|
self.nonlocals.update(visitor.loads - visitor.stores)
|
|
|
|
@override
|
|
def visit_AsyncFunctionDef(self, node: ast.AsyncFunctionDef) -> Any:
|
|
"""Visit an async function definition.
|
|
|
|
Args:
|
|
node: The node to visit.
|
|
|
|
Returns:
|
|
Any: The result of the visit.
|
|
"""
|
|
visitor = NonLocals()
|
|
visitor.visit(node)
|
|
self.nonlocals.update(visitor.loads - visitor.stores)
|
|
|
|
@override
|
|
def visit_Lambda(self, node: ast.Lambda) -> Any:
|
|
"""Visit a lambda function.
|
|
|
|
Args:
|
|
node: The node to visit.
|
|
|
|
Returns:
|
|
Any: The result of the visit.
|
|
"""
|
|
visitor = NonLocals()
|
|
visitor.visit(node)
|
|
self.nonlocals.update(visitor.loads - visitor.stores)
|
|
|
|
|
|
class NonLocals(ast.NodeVisitor):
|
|
"""Get nonlocal variables accessed."""
|
|
|
|
def __init__(self) -> None:
|
|
self.loads: set[str] = set()
|
|
self.stores: set[str] = set()
|
|
|
|
@override
|
|
def visit_Name(self, node: ast.Name) -> Any:
|
|
"""Visit a name node.
|
|
|
|
Args:
|
|
node: The node to visit.
|
|
|
|
Returns:
|
|
Any: The result of the visit.
|
|
"""
|
|
if isinstance(node.ctx, ast.Load):
|
|
self.loads.add(node.id)
|
|
elif isinstance(node.ctx, ast.Store):
|
|
self.stores.add(node.id)
|
|
|
|
@override
|
|
def visit_Attribute(self, node: ast.Attribute) -> Any:
|
|
"""Visit an attribute node.
|
|
|
|
Args:
|
|
node: The node to visit.
|
|
|
|
Returns:
|
|
Any: The result of the visit.
|
|
"""
|
|
if isinstance(node.ctx, ast.Load):
|
|
parent = node.value
|
|
attr_expr = node.attr
|
|
while isinstance(parent, ast.Attribute):
|
|
attr_expr = parent.attr + "." + attr_expr
|
|
parent = parent.value
|
|
if isinstance(parent, ast.Name):
|
|
self.loads.add(parent.id + "." + attr_expr)
|
|
self.loads.discard(parent.id)
|
|
elif isinstance(parent, ast.Call):
|
|
if isinstance(parent.func, ast.Name):
|
|
self.loads.add(parent.func.id)
|
|
else:
|
|
parent = parent.func
|
|
attr_expr = ""
|
|
while isinstance(parent, ast.Attribute):
|
|
if attr_expr:
|
|
attr_expr = parent.attr + "." + attr_expr
|
|
else:
|
|
attr_expr = parent.attr
|
|
parent = parent.value
|
|
if isinstance(parent, ast.Name):
|
|
self.loads.add(parent.id + "." + attr_expr)
|
|
|
|
|
|
def is_xxh3_128_hexdigest(value: str) -> bool:
|
|
"""Check if the given string matches the format of xxh3_128_hexdigest."""
|
|
return bool(re.fullmatch(r"[0-9a-f]{32}", value))
|