docs: fix incorrect usage of types.Part methods

types.Part.from_text and types.Part.from_uri do no accept positional argument

Author: debugger22

google/genai/models.py

@@ -5145,9 +5145,9 @@ def generate_content(
       response = client.models.generate_content(
         model='gemini-1.5-flash-002',
         contents=[
-          types.Part.from_text('What is shown in this image?'),
-          types.Part.from_uri('gs://generativeai-downloads/images/scones.jpg',
-          'image/jpeg')
+          types.Part.from_text(text='What is shown in this image?'),
+          types.Part.from_uri(file_uri='gs://generativeai-downloads/images/scones.jpg',
+          mime_type='image/jpeg')
         ]
       )
       print(response.text)
@@ -5264,9 +5264,9 @@ def generate_content_stream(
       for chunk in client.models.generate_content_stream(
         model='gemini-1.5-flash-002',
         contents=[
-          types.Part.from_text('What is shown in this image?'),
-          types.Part.from_uri('gs://generativeai-downloads/images/scones.jpg',
-          'image/jpeg')
+          types.Part.from_text(text='What is shown in this image?'),
+          types.Part.from_uri(file_uri='gs://generativeai-downloads/images/scones.jpg',
+          mime_type='image/jpeg')
         ]
       ):
         print(chunk.text)
@@ -6500,9 +6500,9 @@ async def generate_content_stream(
       async for chunk in awiat client.aio.models.generate_content_stream(
         model='gemini-1.5-flash-002',
         contents=[
-          types.Part.from_text('What is shown in this image?'),
-          types.Part.from_uri('gs://generativeai-downloads/images/scones.jpg',
-          'image/jpeg')
+          types.Part.from_text(text='What is shown in this image?'),
+          types.Part.from_uri(file_uri='gs://generativeai-downloads/images/scones.jpg',
+          mime_type='image/jpeg')
         ]
       ):
         print(chunk.text)