18
08 '15
import matplotlib.pyplot as plt import numpy as np import pandas as pd df = pd.DataFrame({‘icao’: ['kk','bb', 'a1', 'a1']}) df icao 0 kk 1 bb 2 a1 3 a1 pd.DataFrame(data = {‘icao’: np.unique(df.icao, return_inverse=1)[1]}) icao 0 2 1 1 2 0 3 0