问如何检测Python外部模块中的崩溃？

EN

from shapely.geometry import Polygon, MultiPolygon, LineString

import numpy as np
import triangle
import matplotlib.pyplot as plt
import matplotlib.tri as tri
import random

def meshXOR(polyRef, shape, otherVerts, otherSegs, otherHole):

    verts = []
    verts3 = []
    segs = []
    outerLength = len(polyRef[shape[0]])

    for i in range(outerLength-1):#-1 because xorpoly duplicates first point into last spot
        verts.append((polyRef[shape[0]][i][0],polyRef[shape[0]][i][1])) #append the point to the verts array which will be fed into the delaunay triangulator
        if i == outerLength - 2:
            segs.append([i,0])
        else:
            segs.append([i,i+1])

    h = []
    for cInd in shape[1]:
        shift = len(verts)
        innerLength = len(polyRef[cInd])
        for i in range(innerLength-1):
            verts.append((polyRef[cInd][i][0],polyRef[cInd][i][1]))
            if i == innerLength - 2:
                segs.append([i+shift,shift])
            else:
                segs.append([i+shift,i+1+shift])
        h += list(Polygon(polyRef[cInd]).representative_point().coords)
    print 'verts are: ', verts
    #output: verts are:  [(0.0, 5.0), (0.0, 10.0), (10.0, 10.0), (10.0, 0.0), (0.0, 0.0), (0.0, 5.0), (7.0, 3.0), (7.0, 7.0)]
    print 'segs are: ', segs
    #output: segs are:  [[0, 1], [1, 2], [2, 3], [3, 4], [4, 0], [5, 6], [6, 7], [7, 5]]
    print 'holes are: ', h
    #output: holes are:  [(5.25, 6.0)]

    print 'verts: ', verts == otherVerts
    print 'segs: ', segs == otherSegs
    print 'hole: ', h == otherHole

    return verts, segs, h



pA = Polygon([[0.0,0.0],[10.0,0.0],[10.0,10.0],[0.0,10.0]])
pB = Polygon([[0.0,5.0],[7.0,3.0],[7.0,7.0]])

xorPoly = pA.symmetric_difference(pB)

if xorPoly.geom_type == 'Polygon': xorPoly = MultiPolygon([xorPoly])

otherVerts = [(0.0, 5.0), (0.0, 10.0), (10.0, 10.0), (10.0, 0.0), (0.0, 0.0), (0.0, 5.0), (7.0, 3.0), (7.0, 7.0)]
otherSegs = [[0, 1], [1, 2], [2, 3], [3, 4], [4, 0], [5, 6], [6, 7], [7, 5]]
otherHole = [(5.25,6.0)]
xorPolys = []                                               
shapes = []                                                 
for poly in xorPoly:                                                    
    shapes.append([len(xorPolys), [], len(shapes)])
    xorPolys.append(list(poly.exterior.coords))
    for ip in poly.interiors:
        shapes[-1][1].append(len(xorPolys))
        xorPolys.append(list(ip.coords))

try:
    verts, segs, holes = meshXOR(xorPolys, shapes[0], otherVerts, otherSegs, otherHole) # i even tried placing it here
except:
    print 'failed'

if len(holes)>0:
    A  = dict(vertices = np.asarray(verts), segments = np.asarray(segs), holes = holes)
else:
    A  = dict(vertices = np.asarray(verts), segments = np.asarray(segs))

print 'about to tri'
B = triangle.triangulate(A, opts = 'pi') #this is the step that try/except doesn't work on
print 'completed tri'
try:
    B_t = B["triangles"].tolist()
except:
    print 'no trianlges'

if B_t != []:
    cols = []
    import random
    for tri in B_t:
        cols.append(random.random())
    plt.figure()
    plt.gca().set_aspect('equal')
    xy = np.asarray(verts)
    plt.tripcolor(xy[:,0], xy[:,1], B_t, facecolors=np.array(cols))
    #for tri in B_t:
        #print 'tri is: ', [verts[t] for t in tri]
    plt.show()
else:
    print 'no triangles'