patricia-trie is my pure Python (2.7+) implementation of the PATRICIA trie. It is geared for effcient look-ups of string collections on unstructured text. While it cannot beat the C-wrappers of the MARISA trie, I believe this is close to "as fast as it gets" in pure Python. If anybody has improvements to suggest, I would love to hear them!
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A patricia.py trie for efficient string look-ups | Heykuki News