LangChain访问地址：https://learn.activeloop.ai/courses/langchain
什么是 Colab？
借助 Colaboratory（简称 Colab），您可在浏览器中编写和执行 Python 代码，并且：
- 无需任何配置
- 免费使用 GPU
- 轻松共享
无论您是一名学生、数据科学家还是 AI 研究员，Colab 都能够帮助您更轻松地完成工作。
在Colab上如何安装模块？
# 例如安装openai
!pip install openai注意，切记安装模块时，需要带上【!】.
【1】安装langchain
!pip install langchain【2】安装openai
!pip install openai环境准备好后，试跑程序：
from langchain.llms import OpenAI
API_KEY = "your Openai key"
# Before executing the following code, make sure to have
# your OpenAI key saved in the “OPENAI_API_KEY” environment variable.
llm = OpenAI(model="text-davinci-003", temperature=0.9,openai_api_key=API_KEY)
'''
export OPENAI_API_KEY="..."
'''
text = "Suggest a personalized workout routine for someone looking to improve cardiovascular endurance and prefers outdoor activities."
print(llm(text))注意：
# Before executing the following code, make sure to have
# your OpenAI key saved in the “OPENAI_API_KEY” environment variable.
如果是使用了环境变量，export OPENAI_API_KEY="..."
则:
llm = OpenAI(model="text-davinci-003", temperature=0.9)
运行结果：
1. Swimming - Swimming is an excellent low-impact exercise that is perfect for improving cardiovascular endurance. It can be done outdoors at a local lake, pool, or beach.
2. Running - Running is a great way to improve cardiovascular endurance, and it can be done outdoors in a variety of terrain, ranging from asphalt to trails to beach sand.
3. Biking - Biking can be done indoors on a stationary bike, or it can be done outdoors for a change of scenery. It is a great way to improve cardiovascular endurance, while also exploring your local area.
4. Hiking - Hiking is a great low-impact way to improve cardiovascular endurance, while also taking in the beauty of nature. Hikes can be done on trails or up mountains, depending on the individual's preference.
5. Kayaking - Kayaking is a great way to improve cardiovascular endurance while exploring lakes or rivers. It is an excellent full-body workout and it can be done outdoors with the group or solo.
6. Rowing - Rowing is a great way to improve aerobic endurance and it is often done outdoors on a lake or ocean. Rowing is a great full-body workout and it can be