Return the integer index of *series* in this sequence.
(self, series)
| 63 | return self._number_format |
| 64 | |
| 65 | def series_index(self, series): |
| 66 | """ |
| 67 | Return the integer index of *series* in this sequence. |
| 68 | """ |
| 69 | for idx, s in enumerate(self): |
| 70 | if series is s: |
| 71 | return idx |
| 72 | raise ValueError("series not in chart data object") |
| 73 | |
| 74 | def series_name_ref(self, series): |
| 75 | """ |