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-rw-r--r--tests/cpydiff/core_function_userattr.py11
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diff --git a/tests/cpydiff/core_function_userattr.py b/tests/cpydiff/core_function_userattr.py
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+++ b/tests/cpydiff/core_function_userattr.py
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+"""
+categories: Core,Functions
+description: User-defined attributes for functions are not supported
+cause: MicroPython is highly optimized for memory usage.
+workaround: Use external dictionary, e.g. ``FUNC_X[f] = 0``.
+"""
+def f():
+ pass
+
+f.x = 0
+print(f.x)