Python: 'float' object is not subscriptable [duplicate]

Question

I'm trying to map some non numerical values in a pandas dataset that contains information from passengers that were on the Titanic. Right now I'm trying to map the ports where passengers embarked from. There are 3 ports and I'm trying to map them by adding a column for each port. 0 if they embarked from that port 1 if not.

I tried doing something similar with sex. I added another column with a 0 if the sex was male and 1 if the sex was female. That worked, but when I try doing this with the ports I get a "'float' object is not subscriptable" error.

import pandas as pd
#opening the data
train_path = #path to data set
passengers = pd.read_csv(train_path)

#creating a copy
passengers_copy = passengers

#mapping sex
passengers_copy['SexBin'] = [0 if x[0] == 'm' else 1 for x in passengers_copy['Sex']]

#trying to map the first port
passengers_copy['EmbarkedS'] = [0 if x[0] == 'S' else 1 for x in passengers_copy['Embarked']]

I'm trying to run this but passengers_copy is not defined. Please provide everything so we can test your code. — Rob Kwasowski
– Rob Kwasowski, Commented Jul 17, 2019 at 6:26

jtan354 · Accepted Answer · 2019-07-17 06:38:53Z

2

In this: For x in passengers_copy['Embarked'] x is already a float.

With a float, it is not subscriptable (meaning that unlike a list, it cannot be subscripted with square brackets to access the specific index.) because it is simply a number and not a string/list.

When you try x[0], that is what is causing the error.

edited Jul 17, 2019 at 6:38

answered Jul 17, 2019 at 6:30

jtan354

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3 Comments

Maria Contreras Over a year ago

Weird, I'm not getting the error for that line. I only get it on for x in passengers_copy['Embarked'] .

jtan354 Over a year ago

@MariaContreras my mistake, i meant to write Embarked. This is because in your Embarked column, it is a number 0 or 1 right? As for your Sex column, it is a string 'm' or 'f' i presume.

jtan354 Over a year ago

@MariaContreras if my answer has helped you please accept it as an official answer, thank you!

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