[Typing][C-19] Add type annotations for `python/paddle/distributed/co…

…mmunication/recv.py` (PaddlePaddle#66694)

python/paddle/distributed/communication/batch_isend_irecv.py

@@ -14,7 +14,7 @@
 from __future__ import annotations
 
 import contextlib
-from typing import TYPE_CHECKING, Callable
+from typing import TYPE_CHECKING, Callable, Generator, Sequence
 
 import paddle.distributed as dist
 from paddle import framework
@@ -96,7 +96,9 @@ def __init__(
 
 
 @contextlib.contextmanager
-def _coalescing_manager(group, tasks=None):
+def _coalescing_manager(
+    group: Group, tasks: task | None = None
+) -> Generator[None, None, None]:
     group = _get_global_group() if group is None else group
     pg = group.process_group
     pg._start_coalescing()
@@ -109,7 +111,7 @@ def _coalescing_manager(group, tasks=None):
             pg._end_coalescing(tasks)
 
 
-def _check_p2p_op_list(p2p_op_list):
+def _check_p2p_op_list(p2p_op_list: Sequence[P2POp]) -> None:
     """
     Helper to check that the ``p2p_op_list`` is a list of P2POp instances and
     all ops use the same backend.

python/paddle/distributed/communication/recv.py

@@ -12,10 +12,24 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+from __future__ import annotations
+
+from typing import TYPE_CHECKING
+
 from paddle.distributed.communication import stream
 
+if TYPE_CHECKING:
+    from paddle import Tensor
+    from paddle.base.core import task
+    from paddle.distributed.communication.group import Group
+
 
-def recv(tensor, src=0, group=None, sync_op=True):
+def recv(
+    tensor: Tensor,
+    src: int = 0,
+    group: Group | None = None,
+    sync_op: bool = True,
+) -> task:
     """
     Receive a tensor to the sender.
 
@@ -51,7 +65,9 @@ def recv(tensor, src=0, group=None, sync_op=True):
     )
 
 
-def irecv(tensor, src=None, group=None):
+def irecv(
+    tensor: Tensor, src: int | None = None, group: Group | None = None
+) -> task:
     """
     Receive a tensor to the sender.