You can save an image from a Surface with the save() function. Save() can save your Surface as a BMP, TGA, PNG, or JPEG image. The function will take in
the Surface you want to save the image from and the filename you'd like to generate. If the extension for the filename is not recognize, save() will default to TGA.
```Python
Surface = pygame.Surface(100, 100)
filename = 'surface.png'
pygame.image.save(Surface, filename)
```

University of Michigan - Ann Arbor

The image module contains functions for loading and saving image files. Images will be loaded as Surface objects. Images can be saved by passing in the Surface you want to make an Image file out of. The module will then generate an image file from the Surface. 
Note that there are no image objects in Pygame--images are stored on Surfaces. The Surface class will allow you to manipulate the image on the Surface by 
selecting and modifying regions of it, along with drawing over it with lines and other shapes (see Drawing in Pygame). By default only uncompressed BMP images can be loaded.
When built with full image support, the pygame.image.load() function can support the following formats:
- JPG
- PNG
- GIF (non-animated)
- BMP
- PCX
- TGA (uncompressed)
- TIF
- LBM (and PBM)
- PBM (and PGM, PPM)
- XPM

Saving images only supports a limited set of formats. You can save to the following formats:
- BMP
- TGA
- PNG
- JPEG

Images in Pygame

Pygame Documentation

There are three functions for loading images: load_basic(), load(), and load_extended(). Load_basic() only supports uncompressed BMP file formats. 
If Pygame was built with extended image support, load() should be able to process most image formats--if not, it will be the same as load_basic(). 
Load_extended() is similar to load() but can only be called if Pygame was built with extended image support.
Each of these functions takes in a filename or file-like object and returns a Surface containing the image.
```Python
basicImage = 'cat.bmp'
image = 'cat.png'
surfaceA =  pygame.image.load_basic(basiscImage)
surfaceB =  pygame.image.load(image)
surfaceC =  pygame.image.load_extended(image)
```

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