Python, Pandas, Data Science, Machine Learning, Pandas Dataframe.
df.groupby("Car").size() #64.5 ms ± 37.9 µs per loop (mean ± std. dev. of 7 runs, 10 loops each) """ Car Audi 110642 Bmw 110906 Fiat 111239 Jaguar 111313 Mercedes 110389 Nissan 110960 Porsche 111504 Toyota 111601 dtype: int64 """ Iteration Iterations can be time-consuming with large datasets,