有可能，但如果性能很重要，那就不是 好主意:

It is possible, but if performance is important, it is not good idea:

df['range'] = [np.arange(s, e + .5, .5) for s, e in zip(df['x'], df['y'])]
print (df)
     x    y            range
0  0.5  1.5  [0.5, 1.0, 1.5]
1  2.5  3.5  [2.5, 3.0, 3.5]
2  1.5  2.5  [1.5, 2.0, 2.5]
3  4.5  5.5  [4.5, 5.0, 5.5]