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O'Reilly Platform
book
Python语言及其应用(第2版)
by
Bill Lubanovic
March 2022
Intermediate to advanced
522 pages
13h 52m
Chinese
Posts & Telecom Press
Content preview from
Python语言及其应用(第2版)
270
|
第
16
章
16.4.2
电子表格
电子表格,尤其是
Microsoft Excel
,是广为使用的二进制文件格式。如果把电子表格保存
为
CSV
文件
,就可以使用标准
csv
模块读取文件内容。这适用于二进制
xls
文件、
xlrd
或
tablib
(参见
16.3.7
节
)。
16.4.3 HDF5
HDF5
是一种用于多维或层次化数值数据的二进制数据格式。它主要应用于科学领域,其
中对于大型数据集(
GB
到
TB
)的快速随机访问是很常见的要求
。尽管在某些情况下,
HDF5
可以很好地代替数据库
,但出于某种原因,商业界对
HDF5
几乎一无所知。
HDF5
最适合
WORM
(
write once/read
many
,一次写入
/
多次读取)应用,这种应用无须担心数
据库冲突。下面两个模块也许能派上用场。
•
h5py
是一个功能完善的低层接口。
•
PyTables
较为高级,具有与数据库类似的特性。
第
22
章会从
Python
的科学应用方面讨论这两个问题
。如果你需要存储和检索大量的数
据,并且愿意考虑一些非常规之选以及通常的数据库解决方案,那么不妨尝试一下
HDF5
。
Million Song dataset
就是一个很好的例子
,其可下载歌曲数据就采用了
HDF5
格式和
SQLite
格式。
16.4.4 TileDB
HDF5
的最新“继任者”是
TileDB
,用于密集或备用阵列存储。可以运行
pip install
tiledb
安装
Python
接口(其中包括
TileDB
库本身)。它的主要用途在于科学数据及应用。
16.5
关系数据库
关系数据库问世仅
40
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Publisher Resources
ISBN: 9787115586223