doc: update readme

Author: dsdanielpark

README.md

@@ -143,6 +143,8 @@ print(response.text)
 
 ### # 04. Image generation
 Returns images generated by Gemini.
+> [!NOTE]
+> Use GeminiImage for image processing. `web_images` works without cookies, but for images like `generated_image` from Gemini, pass cookies. Cookies are needed to download images from Google's storage. Check the response or use existing cookies variable.
 
 *Sync*
 ```python
@@ -151,30 +153,39 @@ from gemini import Gemini, GeminiImage
 response = GeminiClient.generate_content("Create illustrations of Seoul, South Korea.")
 generated_images = response.generated_images # Check generated images [Dict]
 
-GeminiImage.save_sync(generated_images, save_path="cached")
+GeminiImage.save_sync(generated_images, save_path="save_dir", cookies=cookies)
 
 # You can use byte type image dict for printing images as follow:
-bytes_images_dict = GeminiImage.fetch_images_dict_sync(generated_images, cookies) # Get bytes images dict
-from IPython.display import display, Image
-import io
+# bytes_images_dict = GeminiImage.fetch_images_dict_sync(generated_images, cookies=cookies) # Get bytes images dict
+# GeminiImage.save_images_sync(bytes_images_dict, path="save_dir", cookies=cookies) # Save to path
+```
+
+<details><summary>Display images in IPython</summary>
+  
+  ```python
+  bytes_images_dict = GeminiImage.fetch_images_dict_sync(generated_images, cookies) # Get bytes images dict
+  from IPython.display import display, Image
+  import io
+  
+  for image_name, image_bytes in bytes_images_dict.items():
+      print(image_name)
+      image = Image(data=image_bytes)
+      display(image)
+  ```
+
+</details>
 
-for image_name, image_bytes in bytes_images_dict.items():
-    print(image_name)
-    image = Image(data=image_bytes)
-    display(image)
 
-# GeminiImage.save_images_sync(bytes_images_dict, path="cached") # Save to path
-```
 *Async*
 
 ```python
 response = GeminiClient.generate_content("Create illustrations of Seoul, South Korea.")
 
 generated_images = response.generated_images # Check generated images [Dict]
 
-await GeminiImage.save(generated_images, "cached")
-# image_data_dict = await GeminiImage.fetch_images_dict(generated_images)
-# await GeminiImage.save_images(image_data_dict, "cached")
+await GeminiImage.save(generated_images, "save_dir", cookies=cookies)
+# image_data_dict = await GeminiImage.fetch_images_dict(generated_images, cookies=cookies)
+# await GeminiImage.save_images(image_data_dict, "save_dir")
 ```
 
 <details><summary>Async wrapper</summary>
@@ -183,11 +194,11 @@ await GeminiImage.save(generated_images, "cached")
 import asyncio
 from gemini import Gemini, GeminiImage
 
-async def fetch_and_save_images_async(prompt: str, save_path: str="cached"):
+async def fetch_and_save_images_async(prompt: str, save_path: str="save_dir", cookies=cookies):
     response = await GeminiClient.generate_content_async(prompt)
 
     generated_images = response.generated_images  # Check response images [Dict]
-    await GeminiImage.save(generated_images, save_path=save_path)
+    await GeminiImage.save(generated_images, save_path=save_path, cookies=cookies)
 
 # Run the async function
 if __name__ == "__main__":
@@ -201,11 +212,11 @@ if __name__ == "__main__":
 import asyncio
 from gemini import Gemini, GeminiImage
 
-async def fetch_and_save_images_async(prompt: str, save_path: str="cached"):
+async def fetch_and_save_images_async(prompt: str, save_path: str="save_dir", cookies):
     response = await GeminiClient.generate_content_async(prompt)
 
     generated_images = response.generated_images  # Check response images [Dict]
-    image_data_dict = await GeminiImage.fetch_images_dict(generated_images)  # Get bytes images dict asynchronously
+    image_data_dict = await GeminiImage.fetch_images_dict(generated_images, cookies=cookies)  # Get bytes images dict asynchronously
     await GeminiImage.save_images(image_data_dict, save_path=save_path)  # Save to path asynchronously
 
 # Run the async function
@@ -229,21 +240,21 @@ from gemini import Gemini, GeminiImage
 response = GeminiClient.generate_content("Please recommend a travel itinerary for Seoul.")
 response_images = response.web_images # Check response images [Dict]
 
-GeminiImage.save_sync(response_images, save_path="cached")
+GeminiImage.save_sync(response_images, save_path="save_dir")
 
 # You can use byte type image dict as follow:
 # bytes_images_dict = GeminiImage.fetch_bytes_sync(response_images, cookies) # Get bytes images dict
-# GeminiImage.save_images_sync(bytes_images_dict, path="cached") # Save to path
+# GeminiImage.save_images_sync(bytes_images_dict, path="save_dir") # Save to path
 ```
 *Async*
 ```python
 response = GeminiClient.generate_content("Create illustrations of Seoul, South Korea.")
 
 response_images = response.web_images # Check generated images [Dict]
 
-await GeminiImage.save(response_images, "cached")
+await GeminiImage.save(response_images, "save_dir")
 # image_data_dict = await GeminiImage.fetch_images_dict(response_images)
-# await GeminiImage.save_images(image_data_dict, "cached")
+# await GeminiImage.save_images(image_data_dict, "save_dir")
 ```
 
 <details><summary>Async wrapper</summary>
@@ -252,11 +263,11 @@ await GeminiImage.save(response_images, "cached")
 import asyncio
 from gemini import Gemini, GeminiImage
 
-async def fetch_and_save_images_async(prompt: str, save_path: str="cached"):
+async def fetch_and_save_images_async(prompt: str, save_path: str="save_dirs", cookies=cookies):
     response = await GeminiClient.generate_content_async(prompt)
 
     response_images = response.web_images  # Check response images [Dict]
-    await GeminiImage.save(response_images, save_path=save_path)
+    await GeminiImage.save(response_images, save_path=save_path, cookies=cookies)
 
 # Run the async function
 if __name__ == "__main__":
@@ -270,11 +281,11 @@ if __name__ == "__main__":
 import asyncio
 from gemini import Gemini, GeminiImage
 
-async def fetch_and_save_images_async(prompt: str, save_path: str="cached"):
+async def fetch_and_save_images_async(prompt: str, save_path: str="save_dir", cookies=cookies):
     response = await GeminiClient.generate_content_async(prompt)
 
     response_images = response.web_images  # Check response images [Dict]
-    image_data_dict = await GeminiImage.fetch_images_dict(response_images)  # Get bytes images dict asynchronously
+    image_data_dict = await GeminiImage.fetch_images_dict(response_images, cookies=cookies)  # Get bytes images dict asynchronously
     await GeminiImage.save_images(image_data_dict, save_path=save_path)  # Save to path asynchronously
 
 # Run the async function