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Pandas: How to use LocIndexer?

I am trying to figure out how to use a Locindexer object to select a subset of a DataFrame.

for instance

var = df.loc(df['rating'] == 4)

Returns as

pandas.core.indexing._LocIndexer

How to use LocIndexer to select a subset of my frame?

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3 answers

You call it a function. For indexing you use [].

 df.loc[df['rating'] == 4]

will return a row / rows in which the column value is 4.

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You should have no problem choosing a subset using the following code.

 subset = df.loc[(df['rating'] == 4)]
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Also, if you selected a line with:

 subset = df.loc[(df['rating'] == 4)]

you can get a special column of this row with

1.

 df.loc[(df['rating'] == 4)]["column]

2.

 subset["column"]
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Source: https://habr.com/ru/post/1265758/

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