def asfreq(self, fill_value=None):
return self._upsample('<STR_LIT>', fill_value=fill_value)<EOL>
Return the values at the new freq, essentially a reindex.

Parameters
----------
fill_value : scalar, optional
    Value to use for missing values, applied during upsampling (note
    this does not fill NaNs that already were present).

    .. versionadded:: 0.20.0

See Also
--------
Series.asfreq
DataFrame.asfreq