无法检索已上载文件的内容。
请建议出了什么问题？我已经尝试了每种类型的文件：搜索、分类、答案和微调。文件上传成功，但在检索内容时显示错误。

import openai

openai.api_key = "sk-bbjsjdjsdksbndsndksbdksbknsndksd" # this is wrong key

# Replace file_id with the file's id whose file content is required
content = openai.File.download("file-5Xs86wEDO5gx8fOitMYArV8r")

print(content)

错误：

Traceback (most recent call last):
  File "main.py", line 6, in <module>
    content = openai.File.download("file-5Xs86wEDO5gx8fOitMYArV8r")
  File "/usr/local/lib/python3.8/dist-packages/openai/api_resources/file.py", line 61, in download
    raise requestor.handle_error_response(
openai.error.InvalidRequestError: Not allowed to download files of purpose: classifications