DatetimeIndex.shape return a tuple of the shape of the underlying data

Panel.ffill(axis=None, inplace=False, limit=None, downcast=None) [source] Synonym for NDFrame.fillna(method=?ffill?)

TimedeltaIndex.is_mixed() [source]

Series.dt.seconds Number of seconds (>= 0 and less than 1 day) for each element.

Index.tolist() [source] return a list of the Index values

DataFrame.ndim Number of axes / array dimensions

Panel4D.get_dtype_counts() [source] Return the counts of dtypes in this object.

Panel4D.pop(item) [source] Return item and drop from frame. Raise KeyError if not found.

DataFrame.merge(right, how='inner', on=None, left_on=None, right_on=None, left_index=False, right_index=False, sort=False, suffixes=('_x', '_y'), copy=True, indicator=False) [source] Merge DataFrame objects by performing a database-style join operation by columns or indexes. If joining columns on columns, the DataFrame indexes will be ignored. Otherwise if joining indexes on indexes or indexes on a column or columns, the index will be passed on. Parameters: right : DataFrame how : {?left?,

DatetimeIndex.dtype = None