当前行为

在没有安装redis的环境中导入gptcache会失败(因为它没有被声明为必需的依赖项),并且无法安装(例如，只读文件系统的环境，如AWS lambda)。

import guidance
  File "/var/task/guidance/__init__.py", line 7, in <module>
    from ._program import Program
  File "/var/task/guidance/_program.py", line 17, in <module>
    from .llms import _openai
  File "/var/task/guidance/llms/__init__.py", line 1, in <module>
    from ._openai import OpenAI, MSALOpenAI, AzureOpenAI
  File "/var/task/guidance/llms/_openai.py", line 15, in <module>
    from ._llm import LLM, LLMSession, SyncSession
  File "/var/task/guidance/llms/_llm.py", line 5, in <module>
    from .caches import Cache, DiskCache
  File "/var/task/guidance/llms/caches/__init__.py", line 3, in <module>
    from ._gptcache import GPTCache
  File "/var/task/guidance/llms/caches/_gptcache.py", line 8, in <module>
    from gptcache.adapter.api import get, put, init_similar_cache
  File "/var/task/gptcache/__init__.py", line 5, in <module>
    from gptcache.core import Cache
  File "/var/task/gptcache/core.py", line 7, in <module>
    from gptcache.manager import get_data_manager
  File "/var/task/gptcache/manager/__init__.py", line 4, in <module>
    from gptcache.manager.factory import get_data_manager, manager_factory
  File "/var/task/gptcache/manager/factory.py", line 6, in <module>
    from gptcache.manager.data_manager import SSDataManager, MapDataManager
  File "/var/task/gptcache/manager/data_manager.py", line 10, in <module>
    from gptcache.manager.eviction.distributed_cache import NoOpEviction
  File "/var/task/gptcache/manager/eviction/distributed_cache.py", line 8, in <module>
    import_redis()
  File "/var/task/gptcache/utils/__init__.py", line 260, in import_redis
    _check_library("redis")
  File "/var/task/gptcache/utils/__init__.py", line 59, in _check_library
    prompt_install(package if package else libname)
  File "/var/task/gptcache/utils/dependency_control.py", line 20, in prompt_install
    raise PipInstallError(package) from e

Could not install packages due to an OSError: [Errno 30] Read-only file system: '/home/sbx_user1051'

预期行为

gptcache不应该代表用户安装软件包。
强制性软件包应该在requirements.txt/setup.py中声明，可选功能只有在这些软件包可用时才启用，如果在没有所需软件包的情况下尝试使用该功能，将在运行时引发错误。

重现步骤

Create an AWS lambda function that declares gptcache as a dependency.
In the handler import gptcache.
Trigger the lamdba.

环境

AWS Lambda

其他事项？

• 无响应*