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venv/lib/python3.12/site-packages/eventlet/green/builtin.py

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+"""
+In order to detect a filehandle that's been closed, our only clue may be
+the operating system returning the same filehandle in response to some
+other  operation.
+
+The builtins 'file' and 'open' are patched to collaborate with the
+notify_opened protocol.
+"""
+
+builtins_orig = __builtins__
+
+from eventlet import hubs
+from eventlet.hubs import hub
+from eventlet.patcher import slurp_properties
+import sys
+import six
+
+__all__ = dir(builtins_orig)
+__patched__ = ['open']
+if six.PY2:
+    __patched__ += ['file']
+
+slurp_properties(builtins_orig, globals(),
+                 ignore=__patched__, srckeys=dir(builtins_orig))
+
+hubs.get_hub()
+
+if six.PY2:
+    __original_file = file
+
+    class file(__original_file):
+        def __init__(self, *args, **kwargs):
+            super(file, self).__init__(*args, **kwargs)
+            hubs.notify_opened(self.fileno())
+
+
+__original_open = open
+__opening = False
+
+
+def open(*args, **kwargs):
+    global __opening
+    result = __original_open(*args, **kwargs)
+    if not __opening:
+        # This is incredibly ugly. 'open' is used under the hood by
+        # the import process. So, ensure we don't wind up in an
+        # infinite loop.
+        __opening = True
+        hubs.notify_opened(result.fileno())
+        __opening = False
+    return result