Python 如何检查值是否在从熊猫数据框中选择的列表中?
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时间:2020-08-19 10:18:12 来源:igfitidea点击:
How to check if a value is in the list in selection from pandas data frame?
提问by Roman
Looks ugly:
长得丑:
df_cut = df_new[
(
(df_new['l_ext']==31) |
(df_new['l_ext']==22) |
(df_new['l_ext']==30) |
(df_new['l_ext']==25) |
(df_new['l_ext']==64)
)
]
Does not work:
不起作用:
df_cut = df_new[(df_new['l_ext'] in [31, 22, 30, 25, 64])]
Is there an elegant and working solution of the above "problem"?
上述“问题”是否有优雅且有效的解决方案?
回答by jpp
You can use pd.DataFrame.query
:
您可以使用pd.DataFrame.query
:
select_values = [31, 22, 30, 25, 64]
df_cut = df_new.query('l_ext in @select_values')
In the background, this uses the top-level pd.eval
function.
在后台,这使用顶级pd.eval
函数。