[FIXED] How could this pandas code work (lambda)?

Issue

• The red highlight part is pd.read_csv, we can get a dataframe type object here;

• Then the blue highlight part is a list with lambda function (we can filter account ID when reading the CSV file).

This method seems very smart, but a bit confusing to me. Could anyone explain how this could work as a filter? Thank you very much.

Solution

The [...] part is called indexing, and basically there you're just creating a function (a "lambda" function) and indexing the dataframe with it. What you're going to get out of it is all the rows where acct_id is OVIWFZA.

It's identical to this:

df = pd.read_csv('/content/drive/client.csv', nrows=5)
df = df[df['acct_id'] == 'OVIWFZA']

Answered By - user17242583

Answer Checked By - Mary Flores (PHPFixing Volunteer)