Function calling example in SDK documentation gives INVALID_ARGUMENT error

[robince]

Environment details

• Programming language: Python
• OS: Mac OS X 14.7.2 Apple Silicon
• Language runtime version: Python 3.11.10
• Package version: 0.3.0

Steps to reproduce

1. Run verbatim the example code from the SDK documentation: https://googleapis.github.io/python-genai/#automatic-python-function-support (after fixing a typo
   function_reponse -> function_response)
2. The final call to generate_content gives an error:

response = client.models.generate_content(
    model='gemini-2.0-flash-exp',
    contents=[
        types.Part.from_text("What is the weather like in Boston?"),
        function_call_part,
        function_response_part,
    ])

ClientError: 400 INVALID_ARGUMENT. {'error': {'code': 400, 'message': 'Please ensure that function call turn contains at least one function_call part which can not be mixed with function_response parts.', 'status': 'INVALID_ARGUMENT'}}

[robince]

This works if I pass Contents instead of Parts:

user_prompt_content = types.Content(
    role="user", parts=[types.Part.from_text("What is the weather like in Boston?")]
)
function_call_content = response.candidates[0].content
function_response_content = types.Content(role="tool", parts=[function_response_part])

response = client.models.generate_content(
    model="gemini-2.0-flash-exp",
    contents=[
        user_prompt_content,
        function_call_content,
        function_response_content,
    ],
    config=types.GenerateContentConfig(
        tools=[tool],
    ),
)