Gemini Nano Banana 图像生成完全指南

from google import genai
from google.genai import types
from PIL import Image

client = genai.Client()

prompt = ("Create a picture of a nano banana dish in a fancy restaurant with a Gemini theme")

response = client.models.generate_content(
    model="gemini-2.5-flash-image",
    contents=[prompt],
)

for part in response.parts:
    if part.text is not None:
        print(part.text)
    elif part.inline_data is not None:
        image = part.as_image()
        image.save("generated_image.png")

from google import genai
from google.genai import types
from PIL import Image

client = genai.Client()

prompt = (
    "Create a picture of my cat eating a nano-banana in a "
    "fancy restaurant under the Gemini constellation",
)

image = Image.open("/path/to/cat_image.png")

response = client.models.generate_content(
    model="gemini-2.5-flash-image",
    contents=[prompt, image],
)

for part in response.parts:
    if part.text is not None:
        print(part.text)
    elif part.inline_data is not None:
        image = part.as_image()
        image.save("generated_image.png")

from google import genai
from google.genai import types

client = genai.Client()

chat = client.chats.create(
    model="gemini-3-pro-image-preview",
    config=types.GenerateContentConfig(
        response_modalities=['TEXT', 'IMAGE'],
        tools=[{"google_search": {}}]
    )
)

message = "Create a vibrant infographic that explains photosynthesis as if it were a recipe for a plant's favorite food. Show the \"ingredients\" (sunlight, water, CO2) and the \"finished dish\" (sugar/energy). The style should be like a page from a colorful kids' cookbook, suitable for a 4th grader."

response = chat.send_message(message)

for part in response.parts:
    if part.text is not None:
        print(part.text)
    elif image:= part.as_image():
        image.save("photosynthesis.png")

message = "Update this infographic to be in Spanish. Do not change any other elements of the image."

aspect_ratio = "16:9"  # "1:1","2:3","3:2","3:4","4:3","4:5","5:4","9:16","16:9","21:9"
resolution = "2K"      # "1K", "2K", "4K"

response = chat.send_message(message, config=types.GenerateContentConfig(
    image_config=types.ImageConfig(
        aspect_ratio=aspect_ratio,
        image_size=resolution
    ),
))

for part in response.parts:
    if part.text is not None:
        print(part.text)
    elif image:= part.as_image():
        image.save("photosynthesis_spanish.png")

from google import genai
from google.genai import types
from PIL import Image

prompt = "An office group photo of these people, they are making funny faces."

aspect_ratio = "5:4"  # "1:1","2:3","3:2","3:4","4:3","4:5","5:4","9:16","16:9","21:9"
resolution = "2K"     # "1K", "2K", "4K"

client = genai.Client()

response = client.models.generate_content(
    model="gemini-3-pro-image-preview",
    contents=[
        prompt,
        Image.open('person1.png'),
        Image.open('person2.png'),
        Image.open('person3.png'),
        Image.open('person4.png'),
        Image.open('person5.png'),
    ],
    config=types.GenerateContentConfig(
        response_modalities=['TEXT', 'IMAGE'],
        image_config=types.ImageConfig(
            aspect_ratio=aspect_ratio,
            image_size=resolution
        ),
    )
)

for part in response.parts:
    if part.text is not None:
        print(part.text)
    elif image:= part.as_image():
        image.save("office.png")

from google import genai

prompt = "Visualize the current weather forecast for the next 5 days in San Francisco as a clean, modern weather chart. Add a visual on what I should wear each day"

aspect_ratio = "16:9"

client = genai.Client()

response = client.models.generate_content(
    model="gemini-3-pro-image-preview",
    contents=prompt,
    config=types.GenerateContentConfig(
        response_modalities=['Text', 'Image'],
        image_config=types.ImageConfig(
            aspect_ratio=aspect_ratio,
        ),
        tools=[{"google_search": {}}]
    )
)

for part in response.parts:
    if part.text is not None:
        print(part.text)
    elif image:= part.as_image():
        image.save("weather.png")

from google import genai
from google.genai import types

prompt = "Da Vinci style anatomical sketch of a dissected Monarch butterfly. Detailed drawings of the head, wings, and legs on textured parchment with notes in English."

aspect_ratio = "1:1"
resolution = "1K"  # "1K", "2K", "4K"

client = genai.Client()

response = client.models.generate_content(
    model="gemini-3-pro-image-preview",
    contents=prompt,
    config=types.GenerateContentConfig(
        response_modalities=['TEXT', 'IMAGE'],
        image_config=types.ImageConfig(
            aspect_ratio=aspect_ratio,
            image_size=resolution
        ),
    )
)

for part in response.parts:
    if part.text is not None:
        print(part.text)
    elif image:= part.as_image():
        image.save("butterfly.png")

config=types.GenerateContentConfig(
    response_modalities=['TEXT', 'IMAGE']
)

config=types.GenerateContentConfig(
    image_config=types.ImageConfig(
        aspect_ratio="16:9",
        image_size="2K"
    ),
)