Replace string/value in entire DataFrame

Question

I have a very large dataset were I want to replace strings with numbers. I would like to operate on the dataset without typing a mapping function for each key (column) in th

Answer 1

Considering data is your pandas DataFrame you can also use:

data.replace({'very bad': 1, 'bad': 2, 'poor': 3, 'good': 4, 'very good': 5}, inplace=True)