Wondering how Pandas process the following statement internally please.

import pandas as pd
test = pd.DataFrame({'classNumber': [2, 4], 'center x': [2, 0], 'center y': [4, 4]})

The output of test:

test.loc[test['classNumber'] == 2, 'center y'] = '5'

The output of test after operation:

Question: so is this how pandas work here: once it sees that test.loc has a boolean statement, it will pass it to a function that will return all rows whose test['classNumber'] == 2 then it will assign those rows' column test['center y'] with the new value 5?

CodePudding user response：

Absolutely! The function df.loc[condition, 'column_name'] will locate rows where condition == True in the column df['column_name'].