In numba world, np.concatenate can not concatenate np.array and list. (as of numba 0.50)
np.concatenate(): expecting a non-empty tuple of arrays, got Tuple(array(int64, 1d, C), list(int64))
python
import numba
import numpy as np
@numba.njit
def foo():
x = np.array([1, 2, 3])
# OK
print(np.concatenate((x, x)))
# NG
print(np.concatenate((x, [1, 2, 3])))
# TypeError: np.concatenate(): expecting a non-empty tuple of arrays, got Tuple(array(int64, 1d, C), list(int64))
foo()