import numpy as np
olist = [x for x in range(5)]
nlist = [ [x+5*y for x in range(5)] for y in range(7)]
data = np.asarray(nlist)
print(data)
print(data[0,2])
print(data[:,3])
print(data[1:2,:])
print(data[1:3,:])
# Zufällig Daten auswählen (mit Zurücklegen)
indices = np.random.randint(0,7,3)
print(indices)
newdata = data[indices,2]
print(newdata)

# Zufällig Daten auswählen (ohne Zurücklegen)
indices = np.random.choice([x for x in range(7)],3,False)
print(indices)
newdata = data[indices,2]
print(newdata)