PIL image writer parameters

The parameters for writing a PIL image are:

1. file: The file object to write the image to. This can be a file-like object or a file path.

2. format: The file format to use. This should be a string indicating the format, such as "JPEG", "PNG", etc.

3. options: A dictionary of options to use when writing the image. The options available depend on the file format being used.

4. **params: Additional parameters to pass to the image writer. These are specific to each image format and are usually optional.