Groupby

źródło danych: http://sigmaquality.pl/wp-content/uploads/2019/09/phone_data.csv In [1]: import pandas as pd import dateutil import numpy as np df = pd.read_csv(’c:/1/phone_data.csv’) df.head(4) Out[1]: index date duration item month network […]

In [4]: import pandas as pd import numpy as np df = pd.DataFrame({’A’ : [’foo’, 'foo’, 'bar’, 'foo’, 'bar’, 'foo’], 'B’ : [’one’, 'two’, 'three’,’two’, 'two’, […]