Getting a TypeError: list indices must be integers or slices, not str

Question

I´m pretty new at python , cant seem to get this code to work , getting a "TypeError: list indices must be integers or slices, not str," --help please ! Thanks a ton

import pandas as pd 
from glob import glob
filenames = glob('abc*.xls')
df3 =[pd.read_excel(f) for f in filenames]
df4 = df3[df3['Unnamed: 11'].str.contains("tele", na=False)]

Answer 1

Here df3 is list of DataFrames, because created by list comprehension.

So you can join all DataFrames together if possible:

df3 =[pd.read_excel(f) for f in filenames]
df33 = pd.concat(df3, ignore_index=True)
df4 = df33[df33['Unnamed: 11'].str.contains("tele", na=False)]

Another idea is processing each DataFrame separately:

for df in df3:
    df4 = df3[df3['Unnamed: 11'].str.contains("tele", na=False)]
    ...
    ...