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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def embed(self, name, data=None):
 		"""Attach an image file and prepare for HTML embedding. 		This method should only be used to embed images. 		:param name: Path to the image to embed if data is None, or the name 					 of the file if the ``data`` argument is given 		:param data: Contents of the image to embed, or None if the data is to 					 be read from the file pointed to by the ``name`` argument 		"""

		if data is None:
			with open(name, 'rb') as fp:
				data = fp.read()
			name = os.path.basename(name)
		elif isinstance(data, bytes):
			pass
		elif hasattr(data, 'read'):
			data = data.read()
		else:
			raise TypeError("Unable to read image contents")

		subtype = imghdr.what(None, data)
		self.attach(name, data, 'image', subtype, True)