reaktome 0.1.22

Advisory-only setattr hooks with veto support

Reaktome

Reaktome is a CPython extension that installs advisory hooks on Python’s built-in containers (list, dict, set).
It allows you to observe and react to mutations without subclassing or replacing types.

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Features

• Patch individual instances of built-in containers.
• Hook into mutations (append, pop, __setitem__, etc.).
• Hooks are called after the mutation (advisory only).
• Works per-instance via an internal side-table.

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Example

import _reaktome

def on_additem(self, key, old, new):
    print(f"{self} added {new}")

lst = []
_reaktome.patch_list(lst, {"__reaktome_additem__": on_additem})

lst.append(42)
# Output: [] added 42