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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 parse_page(raw_page):
 """Create a dictionary with title, id, and list of revisions. The dictionary contains: "title": a string "id": an integer "revisions": a list of strings Args: raw_page: a string Returns: a dictionary, or None in the case of an error. """

  ret = {"title": get_title(raw_page), "id": get_id(raw_page)}
  if ":" in ret["title"]:
    return None
  ret["revisions"] = get_revisions(raw_page)
  return ret