November 2022
Intermediate to advanced
392 pages
10h 8m
Chinese
Content preview from Python算法交易
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In [21]: data_copy_2 = pd.read_json('data/aapl.json')
In [22]: data_copy_2.head()
Out[22]: HIGH CLOSE LOW OPEN COUNT VOLUME
2020-04-01 248.72 240.91 239.1300 246.50 460606 44054638
2020-04-02 245.15 244.93 236.9000 240.34 380294 41483493
2020-04-03 245.70 241.41 238.9741 242.80 293699 32470017
2020-04-06 263.11 262.47 249.3800 250.90 486681 50455071
2020-04-07 271.70 259.43 259.0000 270.80 467375 50721831
In [23]: !rm data/*
从
Excel
文件读取数据到一个新的
DataFrame
对象。
打印数据第一个内存副本的前五行。
将数据从
JSON
文件读取到另一个
DataFrame
对象中。
然后，打印数据第二个内存副本的前五行。
事实证明，
pandas
可以在不同类型的数据文件之间读写金融数据。由于非标准的存
储格式（例如用“
;
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