Remove single letters from strings in Pandas dataframe

Question

I have a DataFrame where a column is filled with strings. I want to remove any appearance of single letters from the column. So far, I have tried:

df['STRI'] = df['STRI'].map(lambda x: " ".join(x.split() if len(x) >1)

I wish to input ABCD X WYZ and get ABCD WYZ.

Answer 1

Try this:

df['STRI'] = npi['STRI'].str.replace(r'\b\w\b', '').str.replace(r'\s+', ' ')

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Eg:

import pandas as pd

df = pd.DataFrame(data=['X ABCD X X WEB X'], columns=['c1'])
print df, '\n'
df.c1 = df.c1.str.replace(r'\b\w\b', '').str.replace(r'\s+', ' ')
print df

Output:

                 c1
0  X ABCD X X WEB X 

           c1
0   ABCD WEB