[英]How to edit pandas dataframe to remove lowercase words but keep uppercase ones?
[英]How to look for words despite being in uppercase or lowercase using pandas?
如何使用 pandas 改進對單詞的搜索,以便即使它們是大寫或小寫也可以識別為相同的?
正如您在圖像中看到的那樣,我擁有:.xls 和 XLS。
import pandas as pd
df = pd.DataFrame({'file_name': ['filelist.xml', 'sheet002', 'sheet005.htm', 'image1.jpg', 'image3.jpg',
'kings.xls', 'Kings.XLS', 'Kings', 'Riders', 'Royals.pdf', 'Royals.csv', 'Riders.xml'],
'created_at': ['2020-01-01 23:00:34'] *2 + ['2018-01-01 13:01:34'] *3 + ['2020-01-01 22:00:00'] *4 + ['2018-02-01 23:00:34']*3,
'size':[8760] * 3 + [789] *4 + [863] *2 + [673] *3})
(df['size'].groupby(df.file_name.str.extract(r'(\.\w+$)', expand=False)
.fillna('unknown'))
.sum().plot.pie())
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