关于python：从pandas数据帧中获取符号

get symbol from a pandas dataframe

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我可以打印我的数据框并看到标签TSLA但我不知道如何从我的变量中获取该字符串... enter image description here

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>>> t.axes
[MultiIndex(levels=[['TSLA'], [2018-07-02 00:00:00, 2018-07-03 00:00:00, 2018-07
-04 00:00:00, 2018-07-05 00:00:00, 2018-07-06 00:00:00, 2018-07-09 00:00:00, 201
8-07-10 00:00:00, 2018-07-11 00:00:00, 2018-07-12 00:00:00, 2018-07-13 00:00:00,
2018-07-16 00:00:00, 2018-07-17 00:00:00, 2018-07-18 00:00:00, 2018-07-19 00:00
:00, 2018-07-20 00:00:00]],
labels=[[0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0], [0, 1, 2, 3, 4
, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14]],
names=['Symbol', 'Date']), Index(['Close', 'High', 'Low', 'Open', 'Vo
lume'], dtype='object')]
>>>