fix(model): replace mutable default evals_result=dict() with None across 27 models#2168
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warren618 wants to merge 1 commit intomicrosoft:mainfrom
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fix(model): replace mutable default evals_result=dict() with None across 27 models#2168warren618 wants to merge 1 commit intomicrosoft:mainfrom
warren618 wants to merge 1 commit intomicrosoft:mainfrom
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…oss 27 models Using dict() as a default argument is a well-known Python antipattern: the dict is created once at function definition time and shared across all calls. This can cause state leakage between separate fit() calls. Changed all 27 affected models in qlib/contrib/model/ to use evals_result=None with an explicit guard, matching the pattern already used in gbdt.py and highfreq_gdbt_model.py.
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Summary
Fixes #2167
27 models use
evals_result=dict()as a mutable default argument infit(). Changed toevals_result=Nonewith explicit guard, matching the pattern ingbdt.py.Changes
For each of the 27 affected files:
27 files changed, 81 insertions, 27 deletions.