捕获错误：未定义“QhullError”

Question

我在处理python代码中的异常时遇到问题。当尝试使用“线性”方法在特定网格上进行三维插值时，会出现错误；这会产生一个QhullError。 使用“最近的”插值效果良好。 因此，我想使用“try/except”捕捉“QhullError”

当我运行代码时，我得到

NameError: name 'QhullError' is not defined

我还尝试了一个自定义类来处理异常，但这根本无法捕获任何内容

你知道我错过了什么吗

非常感谢

找到下面的代码：

import numpy as np
import warnings
from scipy.interpolate import LinearNDInterpolator as Lin3DInterp
from scipy.interpolate import NearestNDInterpolator as Near3DInterp
from random import random


# %% Here I tried a custom class to handle my exception... didn't work either

# class QhullError(Exception):
#     pass

# %%

# choosing interpolation method : 'linear' or 'nearest'
InterpMethod = 'linear'

# evenly spaced grid
grid_points = np.squeeze(np.array([[np.linspace(0, 9, 10)],
                                   [np.linspace(0, 9, 10)],
                                   [np.linspace(0, 9, 10)]]).transpose())
# some random values
grid_points_values = random()*grid_points


if InterpMethod == 'nearest':
    # this works fine
    interp_func = Near3DInterp(grid_points, grid_points_values)

elif InterpMethod == 'linear':

    try:
        # QhullError here, trying to catch that
        interp_func = Lin3DInterp(grid_points, grid_points_values)

    except QhullError:
        warnings.warn('QhullError : linear interpolation failed, '
                      'using ''nearest'' method instead')
        interp_func = Near3DInterp(grid_points, grid_points_values)

Answer 1

您应该能够从此处导入它：

from scipy.spatial.qhull import QhullError