Major fixes and new features

venv/lib/python3.12/site-packages/kafka/util.py

@@ -0,0 +1,66 @@
+from __future__ import absolute_import
+
+import binascii
+import weakref
+
+from kafka.vendor import six
+
+
+if six.PY3:
+    MAX_INT = 2 ** 31
+    TO_SIGNED = 2 ** 32
+
+    def crc32(data):
+        crc = binascii.crc32(data)
+        # py2 and py3 behave a little differently
+        # CRC is encoded as a signed int in kafka protocol
+        # so we'll convert the py3 unsigned result to signed
+        if crc >= MAX_INT:
+            crc -= TO_SIGNED
+        return crc
+else:
+    from binascii import crc32
+
+
+class WeakMethod(object):
+    """
+    Callable that weakly references a method and the object it is bound to. It
+    is based on https://stackoverflow.com/a/24287465.
+
+    Arguments:
+
+        object_dot_method: A bound instance method (i.e. 'object.method').
+    """
+    def __init__(self, object_dot_method):
+        try:
+            self.target = weakref.ref(object_dot_method.__self__)
+        except AttributeError:
+            self.target = weakref.ref(object_dot_method.im_self)
+        self._target_id = id(self.target())
+        try:
+            self.method = weakref.ref(object_dot_method.__func__)
+        except AttributeError:
+            self.method = weakref.ref(object_dot_method.im_func)
+        self._method_id = id(self.method())
+
+    def __call__(self, *args, **kwargs):
+        """
+        Calls the method on target with args and kwargs.
+        """
+        return self.method()(self.target(), *args, **kwargs)
+
+    def __hash__(self):
+        return hash(self.target) ^ hash(self.method)
+
+    def __eq__(self, other):
+        if not isinstance(other, WeakMethod):
+            return False
+        return self._target_id == other._target_id and self._method_id == other._method_id
+
+
+class Dict(dict):
+    """Utility class to support passing weakrefs to dicts
+
+    See: https://docs.python.org/2/library/weakref.html
+    """
+    pass