def to_frame(self, name=None):
if name is None:<EOL><INDENT>df = self._constructor_expanddim(self)<EOL><DEDENT>else:<EOL><INDENT>df = self._constructor_expanddim({name: self})<EOL><DEDENT>return df<EOL>
Convert Series to DataFrame.

Parameters
----------
name : object, default None
    The passed name should substitute for the series name (if it has
    one).

Returns
-------
DataFrame
    DataFrame representation of Series.

Examples
--------
>>> s = pd.Series(["a", "b", "c"],
...               name="vals")
>>> s.to_frame()
  vals
0    a
1    b
2    c