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venv/Lib/site-packages/playwright/_impl/_greenlets.py

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+# Copyright (c) Microsoft Corporation.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import os
+from typing import Tuple
+
+import greenlet
+
+
+def _greenlet_trace_callback(
+    event: str, args: Tuple[greenlet.greenlet, greenlet.greenlet]
+) -> None:
+    if event in ("switch", "throw"):
+        origin, target = args
+        print(f"Transfer from {origin} to {target} with {event}")
+
+
+if os.environ.get("INTERNAL_PW_GREENLET_DEBUG"):
+    greenlet.settrace(_greenlet_trace_callback)
+
+
+class MainGreenlet(greenlet.greenlet):
+    def __str__(self) -> str:
+        return "<MainGreenlet>"
+
+
+class RouteGreenlet(greenlet.greenlet):
+    def __str__(self) -> str:
+        return "<RouteGreenlet>"
+
+
+class LocatorHandlerGreenlet(greenlet.greenlet):
+    def __str__(self) -> str:
+        return "<LocatorHandlerGreenlet>"
+
+
+class EventGreenlet(greenlet.greenlet):
+    def __str__(self) -> str:
+        return "<EventGreenlet>"