def can_add_doc(docs, new_doc):
    """To avoid documents duplicate, look for all url doc.

	Parse self.infos of Crawler and return True if new_doc isn't in it.

	:param docs: the documents to check
	:type docs: list
	:param new_doc: the doc to add
	:type new_doc: dict
	:return: True if can add the doc

	"""
    for doc in docs:
        if doc['url'] == new_doc['url']:
            return False
    return True
