Merge pull request #77 from cubenlp/rex/readme

update readme

README.md

@@ -41,7 +41,15 @@ export OPENAI_API_BASE_URL="https://api.example.com" # 可选
 
 Win 在系统中设置环境变量。
 
-注：环境变量中，`OPENAI_API_BASE` 优先于 `OPENAI_API_BASE_URL`，二者选其一即可。
+也可以在代码中设置：
+
+```py
+import chattool
+chattool.api_key = "sk-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+chattool.api_base = "https://api.example.com/v1"
+```
+
+注：`OPENAI_API_BASE` 优先于 `OPENAI_API_BASE_URL`，二者选其一即可。
 
 ### 示例
 

README_en.md

@@ -40,10 +40,20 @@ Set environment variables in `~/.bashrc` or `~/.zshrc`:
 
 ```bash
 export OPENAI_API_KEY="sk-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
-export OPENAI_API_BASE_URL="https://api.example.com"
-export OPENAI_API_BASE="https://api.example.com/v1"
+export OPENAI_API_BASE="https://api.example.com/v1" 
+export OPENAI_API_BASE_URL="https://api.example.com" # optional
 ```
 
+Or in Python code:
+
+```py
+import chattool
+chattool.api_key = "sk-xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx"
+chattool.api_base = "https://api.example.com/v1"
+```
+
+Note: `OPENAI_API_BASE` is prior to `OPENAI_API_BASE_URL`, and you only need to set one of them.
+
 ## Examples
 
 Example 1, simulate multi-turn dialogue: