Detail: IndexHierarchy: Attribute¶

IndexHierarchy.STATIC = True¶

>>> ih = sf.IndexHierarchy.from_labels((('a', 1024, '1517-04-01'), ('a', 2048, '1789-12-31'), ('b', 0, '1620-11-21')), index_constructors=(sf.Index, sf.Index, sf.IndexDate), name=('x', 'y', 'z'))
>>> ih.STATIC
True

IndexHierarchy.depth¶

Return the depth of the index hierarchy.

>>> ih = sf.IndexHierarchy.from_labels((('a', 1024, '1517-04-01'), ('a', 2048, '1789-12-31'), ('b', 0, '1620-11-21')), index_constructors=(sf.Index, sf.Index, sf.IndexDate), name=('x', 'y', 'z'))
>>> ih.depth
3

IndexHierarchy.dtypes¶

Return a Series of dytpes for each index depth.

Returns: static_frame.Series

>>> ih = sf.IndexHierarchy.from_labels((('a', 1024, '1517-04-01'), ('a', 2048, '1789-12-31'), ('b', 0, '1620-11-21')), index_constructors=(sf.Index, sf.Index, sf.IndexDate), name=('x', 'y', 'z'))
>>> ih.dtypes
<Series>
<Index>
x        <U1
y        int64
z        datetime64[D]
<<U1>    <object>

IndexHierarchy.index_types¶

Return a Series of Index classes for each index depth.

Returns: Series

>>> ih = sf.IndexHierarchy.from_labels((('a', 1024, '1517-04-01'), ('a', 2048, '1789-12-31'), ('b', 0, '1620-11-21')), index_constructors=(sf.Index, sf.Index, sf.IndexDate), name=('x', 'y', 'z'))
>>> ih.index_types
<Series>
<Index>
x        <Index>
y        <Index>
z        <IndexDate>
<<U1>    <object>

IndexHierarchy.memory¶

Return a MemoryDisplay, providing the size in memory of this object. For compound containers, component sizes will also be provided. Size can be interpreted through six combinations of three configurations:

L: Local: memory ignoring referenced array data provided via views. LM: Local Materialized: memory where arrays that are locally owned report their byte payload LMD: Local Materialized Data: locally owned memory of arrays byte payloads, excluding all other components

R: Referenced: memory including referenced array data provided via views RM: Referenced Materialized: memory where arrays that are locally owned or referenced report their byte payload RMD: Referenced Materialized Data: localy owned and referenced array byte payloads, excluding all other components

>>> ih = sf.IndexHierarchy.from_labels((('a', 1024, '1517-04-01'), ('a', 2048, '1789-12-31'), ('b', 0, '1620-11-21')), index_constructors=(sf.Index, sf.Index, sf.IndexDate), name=('x', 'y', 'z'))
>>> ih.memory
         L    Lu    LM   LMu   LMD  LMDu  R     Ru    RM   RMu   RMD  RMDu
Name     214  B     214  B     214  B     214   B     214  B     214  B
Indices  2.23 KB    2.33 KB    1.67 KB    10.33 KB    2.39 KB    1.73 KB
Indexers 184  B     184  B     72   B     184   B     184  B     72   B
Blocks   1.37 KB    1.41 KB    1.09 KB    1.37  KB    1.41 KB    1.09 KB
Values   16   B     16   B     16   B     16    B     16   B     16   B
Total    4.72 KB    4.87 KB    3.67 KB    12.81 KB    4.94 KB    3.73 KB

IndexHierarchy.mloc¶: The memory location, represented as an integer, of the underlying NumPy array.

IndexHierarchy.name¶

A hashable label attached to this container.

Returns: Hashable

>>> ih = sf.IndexHierarchy.from_labels((('a', 1024, '1517-04-01'), ('a', 2048, '1789-12-31'), ('b', 0, '1620-11-21')), index_constructors=(sf.Index, sf.Index, sf.IndexDate), name=('x', 'y', 'z'))
>>> ih.name
('x', 'y', 'z')

IndexHierarchy.names¶

Provide a suitable iterable of names for usage in output formats that require a field name as string for the index.

>>> ih = sf.IndexHierarchy.from_labels((('a', 1024, '1517-04-01'), ('a', 2048, '1789-12-31'), ('b', 0, '1620-11-21')), index_constructors=(sf.Index, sf.Index, sf.IndexDate), name=('x', 'y', 'z'))
>>> ih.names
('x', 'y', 'z')

IndexHierarchy.nbytes¶

Return the total bytes of the underlying NumPy array.

Returns: int

>>> ih = sf.IndexHierarchy.from_labels((('a', 1024, '1517-04-01'), ('a', 2048, '1789-12-31'), ('b', 0, '1620-11-21')), index_constructors=(sf.Index, sf.Index, sf.IndexDate), name=('x', 'y', 'z'))
>>> ih.nbytes
677

IndexHierarchy.ndim¶

Return the number of dimensions.

Returns: int

>>> ih = sf.IndexHierarchy.from_labels((('a', 1024, '1517-04-01'), ('a', 2048, '1789-12-31'), ('b', 0, '1620-11-21')), index_constructors=(sf.Index, sf.Index, sf.IndexDate), name=('x', 'y', 'z'))
>>> ih.ndim
2

IndexHierarchy.positions¶

Return the immutable positions array.

>>> ih = sf.IndexHierarchy.from_labels((('a', 1024, '1517-04-01'), ('a', 2048, '1789-12-31'), ('b', 0, '1620-11-21')), index_constructors=(sf.Index, sf.Index, sf.IndexDate), name=('x', 'y', 'z'))
>>> ih.positions
[0 1 2]

IndexHierarchy.shape¶

Return a tuple describing the shape of the underlying NumPy array.

Returns: tp.Tuple[int]

>>> ih = sf.IndexHierarchy.from_labels((('a', 1024, '1517-04-01'), ('a', 2048, '1789-12-31'), ('b', 0, '1620-11-21')), index_constructors=(sf.Index, sf.Index, sf.IndexDate), name=('x', 'y', 'z'))
>>> ih.shape
(3, 3)

IndexHierarchy.size¶

Return the size of the underlying NumPy array.

Returns: int

>>> ih = sf.IndexHierarchy.from_labels((('a', 1024, '1517-04-01'), ('a', 2048, '1789-12-31'), ('b', 0, '1620-11-21')), index_constructors=(sf.Index, sf.Index, sf.IndexDate), name=('x', 'y', 'z'))
>>> ih.size
9