python - why do we use categorical data-type and cat.codes?

Question

I am a beginner, please explain what this code do precisely?

DataFrame['X'] = pd.Categorical(DataFrame['X'])

DataFrame['X'] = DataFrame['X'].cat.codes

please explain what this code does precisely?

question from:https://stackoverflow.com/questions/65936209/why-do-we-use-categorical-data-type-and-cat-codes

Answer 1

Waitting for answers