code: def try_stmt(self, try_loc, try_colon_loc, body, stmt):
          
          stmt.keyword_loc, stmt.try_colon_loc, stmt.body = \
              try_loc, try_colon_loc, body
          stmt.loc = stmt.loc.join(try_loc)
          return stmt
docs: try_stmt: ('try' ':' suite
                     ((except_clause ':' suite)+
                      ['else' ':' suite]
                      ['finally' ':' suite] |
                      'finally' ':' suite))