parameters: (self, emails)
return_statement: return len(ans)
docstring: :type emails: List[str]
          :rtype: int
docstring_summary: :type emails: List[str]
          :rtype: int
docstring_tokens: : type emails : List [ str ] : rtype : int
function: def numUniqueEmails(self, emails):
          """
          :type emails: List[str]
          :rtype: int
          """
          ans = set()
          for e in emails:
              ans.add(self.convert(e))
              
          return len(ans)
function_tokens: def numUniqueEmails ( self , emails ) : ans = set ( ) for e in emails : ans . add ( self . convert ( e ) ) return len ( ans )