Merge pull request #253004 from dargilco/dargilco/9-27/fix-python-image-buffer-input

Python Image Analysis: Fix missing "Image file" section, and wrong title for "Image buffer" section.

Author: prmerger-automator[bot]

articles/ai-services/computer-vision/includes/how-to-guides/analyze-image-40-python.md

@@ -42,6 +42,14 @@ In your script, create a new [VisionSource](/python/api/azure-ai-vision/azure.ai
 
 ### Image file
 
+In your script, create a new [VisionSource](/python/api/azure-ai-vision/azure.ai.vision.visionsource) object from the local image file you want to analyze.
+
+```python
+vision_source = sdk.VisionSource(filename="sample.jpg")
+```
+
+### Image buffer
+
 In your script, first create an **image_source_buffer**. Get its **image_writer** and call the **write** method to copy the image data into the writer. Then create a new [vision_source](/python/api/azure-ai-vision/azure.ai.vision.visionsource) object from your **image_source_buffer**. In the following code example, `image_buffer` is a variable of type `bytes` containing the image data.
 
 ```python