from google.genai import Client as GoogleGenAIClient
from google.genai.types import Content, Part

def make_client():
  return GoogleGenAIClient(vertexai=True, location="global")

contents = [Content(role="user", parts=[Part.from_text(text="hello world")])]

// this will cause httpx client closed error
make_client().models.generate_content(model="gemini-2.0-flash-001", contents=contents)

// ...
//  File "/opt/venv/lib/python3.10/site-packages/httpx/_client.py", line 901, in send
//    raise RuntimeError("Cannot send a request, as the client has been closed.")

// this will succeed
client = make_client()
client.models.generate_content(model="gemini-2.0-flash-001", contents=contents)