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55272eeceb
Adds filetype to metadata. I've created a decorator that adds metadata to a list of elements. This replaces some existing boilerplate, but also adds a nice layered approach to determining the filetype. Since in some cases several partition_ functions handle a file in various formats, the partition function that first touches a file will be the last one to alter its metadata, resulting in the correct filetype metadata. Tests are added to make sure: * When partition is used, any content type or auto file type detection will override file-specific partition function metadata * Both auto and file-specific partitioning gives the desired filetype metadata Won't work with image files currently... the plumbing is there to use the image format inferred by PIL, but we need to pull in the fix from this PR to unstructured-inference .
