classification metrics import libraries

import pandas as pd
from sklearn.preprocessing import OrdinalEncoder

columns=['buying','maint','doors','persons','lug_boot','safety','class']
df=pd.read_csv("https://archive.ics.uci.edu/ml/machine-learning-databases/car/car.data",names=columns)

ordinalencoder=OrdinalEncoder()
df[df.columns]=ordinalencoder.fit_transform(df)
df