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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 get_posts(self, num=None, tag=None, private=False):
 		""" 		Get all the posts added to the blog. 		Args: 		 num (int):
 Optional. If provided, only return N posts (sorted by date, 		 most recent first). 		 tag (Tag):
 Optional. If provided, only return posts that have a 		 specific tag. 		 private (bool):
 By default (if False), private posts are not included. 		 If set to True, private posts will also be included. 		"""

		posts = self.posts

		if not private:
			posts = [post for post in posts if post.public]

		if tag:
			posts = [post for post in posts if tag in post.tags]

		if num:
			return posts[:num]
		return posts