EDIT: as_matrix is deprecated since version 0.23.0
You can use the built in values or to_numpy (recommended option) method on the dataframe:
In [8]:
df.to_numpy()
Out[8]:
array([[ 0.9, 7. , 5.2, ..., 13.3, 13.5, 8.9],
[ 0.9, 7. , 5.2, ..., 13.3, 13.5, 8.9],
[ 0.8, 6.1, 5.4, ..., 15.9, 14.4, 8.6],
...,
[ 0.2, 1.3, 2.3, ..., 16.1, 16.1, 10.8],
[ 0.2, 1.3, 2.4, ..., 16.5, 15.9, 11.4],
[ 0.2, 1.3, 2.4, ..., 16.5, 15.9, 11.4]])
If you explicitly want lists and not a numpy array add .tolist():
df.to_numpy().tolist()