How to use gnomevfs.get_mime_type()?

Python gnome binding have gnomevfs module that theoretically can get MIME types. But calling gnomevfs.get_mime_type() with any name other than "/dev/null" raises err开发者_开发知识库or "RuntimeError: there was an error reading the file". For example:

import gnomevfs
gnomevfs.get_mime_type( "/tmp/a.py" )
gnomevfs.get_mime_type( "file://tmp/a.py" )
gnomevfs.get_mime_type( "file:///tmp/a.py" )
gnomevfs.get_mime_type( "file://./tmp/a.py" )

This all fails. With any file / folder name except "/dev/null" :(. /tmp/a.py exists and acessible. Any suggestions?

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It works for me. Have you tried with other files in other directories? Are you sure that the user under which Python is being run has access to /tmp/a.py?