Key error when selecting columns in pandas dataframe after read_csv

Question

I\'m trying to read in a CSV file into a pandas dataframe and select a column, but keep getting a key error.

The file reads in successfully and I can view the datafr

Answer 1

The key error generally comes if the key doesn't match any of the dataframe column name 'exactly':

You could also try:

import csv
import pandas as pd
import re
    with open (filename, "r") as file:
        df = pd.read_csv(file, delimiter = ",")
        df.columns = ((df.columns.str).replace("^ ","")).str.replace(" $","")
        print(df.columns)