Map string values in a Pandas Dataframe with integers

Question

In Pandas DataFrame how to map strings in one column with integers. I have around 500 strings in the DataFrame and need to replace them with intege

Answer 1

So what you could do is construct a temporary dataframe and merge this back to your existing dataframe:

temp_df = pd.DataFrame({'Request': df.Request.unique(), 'Request_id':range(len(df.Request.unique()))})

Now merge this back to your original dataframe

df = df.merge(temp_df, on='Request', how='left')