python vim中有哪些对象

:py print b.name            # write the buffer file name
:py b[0] = "hello!!!"       # replace the top line
:py b[:] = None             # delete the whole buffer
:py del b[:]                # delete the whole buffer
:py b[0:0] = [ "a line" ]   # add a line at the top
:py del b[2]                # delete a line (the third)
:py b.append("bottom")      # add a line at the bottom
:py n = len(b)              # number of lines
:py (row,col) = b.mark('a') # named mark
:py r = b.range(1,5)        # a sub-range of the buffer
:py b.vars["foo"] = "bar"   # assign b:foo variable
:py b.options["ff"] = "dos" # set fileformat
:py del b.options["ar"]     # same as :set autoread<