ENH: Add ZeroResp strategy (#2 in Medium Pool benchmark) - #1495
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Evreu1pro wants to merge 4 commits into
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ENH: Add ZeroResp strategy (#2 in Medium Pool benchmark)#1495Evreu1pro wants to merge 4 commits into
Evreu1pro wants to merge 4 commits into
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Adds an adaptive state-machine strategy with dynamic epochs, a stochastic
retaliation buffer (5 + U{1..10}), and a permanent red-line ban after
systemic defections. Includes unit tests (initial C, buffer queue, red line,
reset), strategy registration, classifier entry, and docs index update.
Adds tests for match-length edge cases, end-game harvest, anti-raider, hostile live ban, and epoch/red-line close paths. Updates stochastic and makes_use_of length filter counts after registering ZeroResp.
NumPy 2.x changes scalar repr (np.int64/np.float64) which breaks doctests, match.scores output, and fingerprint probe string equality under CI. Tox already pins numpy==1.26.4 for install_deps; package deps were upgrading to 2.x via numpy>=1.26.4. Constrain the dependency and harden Point creation.
pytest already green (5252 passed, 100% coverage). CI failed on black --check for test_zeroresp and a few pre-existing modules under black 26.x. Format those files so tox commands[1] passes.
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Closing in favour of #1496, which includes ZeroResp and the tournament-ready ZeroResp v2 (rev 2.2), plus CI fixes and a fuller test suite. Showcase package: https://github.com/Evreu1pro/ZeroResp |
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What
Adds ZeroResp, an adaptive long-memory strategy for the iterated Prisoner's Dilemma.
Why
ZeroResp combines:
5 + U{1..10}) — delays punishment to avoid cascade wars and to disrupt short-horizon MDP / Q-learning estimates.is_red_line = True) after systemic abuse (dynamic threshold 2–3).Pre-submission benchmarks (external sandbox): Axelrod medium pool rank #2 (median ≈ 2.918).
How to test
Covered:
is_red_line = Truereset()cleans state for multi-rep tournamentsChanges
axelrod/strategies/zeroresp.py— strategyaxelrod/tests/strategies/test_zeroresp.py— TestPlayer suiteaxelrod/strategies/_strategies.py— registration (from ._strategies import *viastrategies/__init__.py)axelrod/data/all_classifiers.yml— classifier entrydocs/reference/strategy_index.rst— documentation automoduledocs/index.rst— strategy count doctest243 → 244Breaking
No — additive strategy only.