docs: def university_domains():
      # type: () -> set
      """ Return list of university domains outside of .edu TLD
      NOTE: only 2nd level domain is returned, i.e. for aaa.bbb.uk only bbbl.uk
            will be returned. This is necessary since many universities use
            departmenntal domains, like cs.cmu.edu or andrew.cmu.edu
      NOTE2: .edu domains are not included into this list as they're considered
            belonging to universities by default.
  
      How to get the original CSV:
      ```python
      x = requests.get(
           "https://raw.githubusercontent.com/Hipo/university-domains-list/"
           "master/world_universities_and_domains.json").json()
      domains = set(ds for u in x
                    for ds in u['domains'] if not "edu" in ds.rsplit(".", 2)[-2:])
      domains = list(domains)
      pd.Series(domains, index=domains, name="domain"
      ).drop(
          ["chat.ru"]
      ).to_csv("email_university_domains.csv", index=False)
      ```
      """
      fpath = os.path.join(
          os.path.dirname(__file__), "email_university_domains.csv")
      with open(fpath) as fh:
          return set(addr_domain.strip() for addr_domain in fh)