First Sublime Text Plugin

file_path.py

import sublime, sublime_plugin

class FilePathCommand(sublime_plugin.TextCommand):
	""" Show the full file path in the status bar. """
	def run(self, args):
		sublime.status_message(self.view.file_name())

Need to add something like this to the user keymap file:
{"keys": ["f8"], "command":"file_path", "args":{}}