Parse import path. Determine if the path is native or starts with known prefix.

		:param importpath:	import path to parse
		:type  importpath:	str
		:return: bool

def parse(self, importpath):
		"""Parse import path. Determine if the path is native or starts with known prefix.

		:param importpath:	import path to parse
		:type  importpath:	str
		:return: bool
		"""
		# reset default values
		self.native = False
		self._prefix = ""
		self._package = ""

		url = re.sub(r'http://', '', importpath)
		url = re.sub(r'https://', '', url)

		# is import path native package?
		if url.split('/')[0] in self.native_packages["packages"]:
			self.native = True
			return self

		for regex in self.known_ipprefixes:
			match = re.search(regex, url)
			if match:
				self._prefix = match.group(1)
				if match.group(3):
					self._package = match.group(3)
				return self

		raise ValueError("Import path prefix for '%s' not recognized" % importpath)