old_contents: 
  
  class Table(object):
      def __init__(self, name, schema):
          self.name = name
          self.schema = schema
          self.jointype = None
  
          # a set do collect joins
          self.joins = set()
  
      def __eq__(self, other):
          return (self.name == other.name and self.schema == other.schema)
  
      def __ne__(self, other):
          return not self.__eq__(other)
  
      def add_join(self, cols1, cols2):
          join_cols = zip(cols1, cols2)
          for join_col in join_cols:
              join_col = list(join_col)
              join_col.sort()  # sort them to make the set unique
              self.joins.add(tuple(join_col))
  
      @property
      def fullname(self):
          return "\"%s\".\"%s\"" % (self.schema, self.name)
  
      @property
      def alias(self):
          """
          for later alias support
          """
          return "\"%s\"" % self.name
  
      def prepend_alias(self, columns):
          """
          prepend the table alias to a list
          of column names
          """
          return map(lambda x: "%s.\"%s\"" % (self.alias, x), columns)
  
      @property
      def joinsql(self):
          joinlist = list(self.joins)
          joined_columns = map(lambda x: " = ".join(x), joinlist)
          return "%s %s on %s" % (self.jointype if self.join type != None else "join", self.fullname, ' and '.join(joined_columns))
  
new_contents: 
  class Table(object):
      def __init__(self, name, schema):
          self.name = name
          self.schema = schema
          self.jointype = None
  
          # a set do collect joins
          self.joins = set()
  
      def __eq__(self, other):
          return (self.name == other.name and self.schema == other.schema)
  
      def __ne__(self, other):
          return not self.__eq__(other)
  
      def add_join(self, cols1, cols2):
          join_cols = zip(cols1, cols2)
          for join_col in join_cols:
              join_col = list(join_col)
              join_col.sort()  # sort them to make the set unique
              self.joins.add(tuple(join_col))
  
      @property
      def fullname(self):
          return "\"%s\".\"%s\"" % (self.schema, self.name)
  
      @property
      def alias(self):
          """
          for later alias support
          """
          return "\"%s\"" % self.name
  
      def prepend_alias(self, columns):
          """
          prepend the table alias to a list
          of column names
          """
          return map(lambda x: "%s.\"%s\"" % (self.alias, x), columns)
  
      @property
      def joinsql(self):
          joinlist = list(self.joins)
          joined_columns = map(lambda x: " = ".join(x), joinlist)
          return "%s %s on %s" % (self.jointype if self.join type != None else "join", self.fullname, ' and '.join(joined_columns))
  
subject: fix syntax error caused by autopep8