fix: update custom tool example to use string instead of code

examples/custom_tool.py

@@ -7,7 +7,6 @@
 https://github.com/i-am-bee/bee-code-interpreter/blob/main/executor/requirements.txt
 """
 
-import inspect
 import os
 import warnings
 from datetime import datetime
@@ -28,18 +27,20 @@ def heading(text: str) -> str:
 
 # Define hosted function, all requirements must be available in the hosted executor environment.
 # Docstring must be defined and satisfy the following format:
+ip_info_code = '''
+import requests
+
 def ip_info(ip: str) -> dict:
     """
     Get information about an IP address, such as location, company, and carrier name.
 
     :param ip: IP address in the 255.255.255.255 format
     :return: Information about the IP address
     """
-    import requests
-
     response = requests.get(f"https://ipinfo.io/{ip}/geo")
     response.raise_for_status()
     return response.json()
+'''
 
 
 # Get existing tools using Bee API extension
@@ -67,7 +68,7 @@ class SourceCodeTool(openai.BaseModel):
     "/tools",
     cast_to=SourceCodeTool,
     # You can also pass the source code directly as a string without python definition
-    body={"source_code": inspect.getsource(ip_info)},
+    body={"source_code": ip_info_code},
 )
 print("Tool:")
 pprint(custom_tool.model_dump())