PANDAS Finding the exact word and before word in a column of string and append that new column in python (pandas) column

Question

Find the target word and the before word in col_a and append matched string in col_b_PY and col_c_LG columns

    This code i have tried to          


        

Answer 1

Check with

df['col_c_LG'],df['col_c_PY']=df['col_a'].str.extract(r"(\w+\s+LG)"),df['col_a'].str.extract(r"(\w+\s+PY)")
df
Out[474]: 
                                        col_a       ...              col_c_PY
0  Python PY is a general-purpose language LG       ...             Python PY
1       Programming language LG in Python PY        ...             Python PY
2             Its easier LG to understand  PY       ...        understand  PY
3   The syntax of the language LG is clean PY       ...              clean PY
[4 rows x 3 columns]