comefrom: <doocs>0929.Unique Email Addresses_1.py
code: def numUniqueEmails( emails: List[str]) -> int:
      s = set()
      for email in emails:
          local, domain = email.split('@')
          local = local.replace('.', '')
          if (i := local.find('+')) != -1:
              local = local[:i]
          s.add(local + '@' + domain)
      return len(s)
masked: def sample_funcname ( var_0 : List [ str ] ) -> int :
      var_5 = set ( )
      for var_6 in var_0 :
          var_8 , var_10 = var_6.split ( '@' )
          var_8 = var_8.replace ( '.' , '' )
          if ( var_14 := var_8.find ( '+' ) ) != - 1 :
              var_8 = var_8 [ : var_14 ]
          var_5.add ( var_8 + '@' + var_10 )
      return len ( var_5 )
  