pandas DataFrame 行的类字典 get() 方法？

Question

Is there a better, more idiomatic way to do this?

import pandas as pd
df : pd.DataFrame

try:
   row = df.loc[key]
except KeyError:
   row = None

If I wanted a column instead of a row I could just use df.get(key) . I tried df.transpose().get(key) , which does work, but the transpose is not just a view, it physically transposes the data so it is quite slow when used for this purpose.

Answer 1

Use reindex , but that would return a series of NaN :

df.reindex([key]).loc[key]