base接受一个float参数。除了分钟，您还必须考虑秒。
base = ts.index[0].minute + ts.index[0].second/60ts.groupby(pd.Grouper(freq=interval, base=base)).size()2011-01-01 00:05:30 6002011-01-01 00:15:30 6002011-01-01 00:25:30 6002011-01-01 00:35:30 6002011-01-01 00:45:30 6002011-01-01 00:55:30 600Freq: 10T, dtype: int64
