Fix the eviction error

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[codecov[bot]]

Codecov Report

Merging #440 (21f3219) into dev (c0c626b) will increase coverage by 0.00%. The diff coverage is 100.00%.

Additional details and impacted files

[](https://app.codecov.io/gh/zilliztech/GPTCache/pull/440?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zilliztech) ```diff @@ Coverage Diff @@ ## dev #440 +/- ## ======================================= Coverage 93.89% 93.89% ======================================= Files 90 90 Lines 3325 3327 +2 ======================================= + Hits 3122 3124 +2 Misses 203 203 ``` | [Impacted Files](https://app.codecov.io/gh/zilliztech/GPTCache/pull/440?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zilliztech) | Coverage Δ | | |---|---|---| | [gptcache/manager/eviction/manager.py](https://app.codecov.io/gh/zilliztech/GPTCache/pull/440?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zilliztech#diff-Z3B0Y2FjaGUvbWFuYWdlci9ldmljdGlvbi9tYW5hZ2VyLnB5) | `100.00% <100.00%> (ø)` | | | [gptcache/manager/eviction/memory\_cache.py](https://app.codecov.io/gh/zilliztech/GPTCache/pull/440?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=zilliztech#diff-Z3B0Y2FjaGUvbWFuYWdlci9ldmljdGlvbi9tZW1vcnlfY2FjaGUucHk=) | `90.90% <100.00%> (ø)` | |