我有一个3D数组(n,3,2)用于保存三个2D矢量的组,我正在迭代它们:
import numpy as np
for x in np.zeros((n,2,3), dtype=np.float64):
print(x) # for example
正常numpy这个工作正常,但当我在
中包装有问题的函数时 @numba.jit(nopython=True)
我收到如下错误。
numba.errors.LoweringError: Failed at nopython (nopython mode backend)
iterating over 3D array
File "paint.py", line 111
[1] During: lowering "$77.2 = iternext(value=$phi77.1)" at paint.py (111)
供参考,实际代码为here
答案 0 :(得分:5)
看起来这只是没有实现。
In [13]: @numba.njit
...: def f(v):
...: for x in v:
...: y = x
...: return y
In [14]: f(np.zeros((2,2,2)))
NotImplementedError Traceback (most recent call last)
<snip>
LoweringError: Failed at nopython (nopython mode backend)
iterating over 3D array
File "<ipython-input-13-788b4772d1d9>", line 3
[1] During: lowering "$7.2 = iternext(value=$phi7.1)" at <ipython-input-13-788b4772d1d9> (3)
如果使用索引循环,似乎可以正常工作。
In [15]: @numba.njit
...: def f(v):
...: for i in range(len(v)):
...: y = v[i]
...: return y
In [16]: f(np.zeros((2,2,2)))
Out[16]:
array([[ 0., 0.],
[ 0., 0.]])