我目前正在开发一种用于包裹交付的最佳交付算法。我有一个问题，因为在开发程序时，我遇到了OSMNX的plot_graph_route（）函数的问题。
当我像下面的代码一样编码时，我将获得KeyError的结果：“长度”。
这是错误代码。
"C:\Python38\lib\site-packages\osmnx\plot.py", line 303, in plot_graph_route
data = min(G.get_edge_data(u, v).values(), key=lambda d: d["length"])
File "C:\Python38\lib\site-packages\osmnx\plot.py", line 303, in <lambda>
data = min(G.get_edge_data(u, v).values(), key=lambda d: d["length"])
KeyError: 'length'
由于我的测试，假定以下列表A中的两个节点之间发生错误。连接两个节点，即使我任意在两个节点之间添加了一个边缘，也会发生错误。节点之间的路径是通过使用NetWokx的Shortest_path_length（）函数获得的结果。
这是我的代码
import networkx as nx
import osmnx as ox
import requests
import numpy as np
a= [1916534315,1916534308] #list_of_problem_node
G = ox.graph_from_place('Gumi, Gyeongsangbuk-do, Korea', network_type='drive')#graph of I want to find
########## for save and load convinience
# ox.save_graphml(G,'gumimap')
# G = ox.load_graphml('gumimap')
G.add_edge(1916534315,1916534308)
G.add_edge(1916534308,1916534315)
G=ox.utils_graph.get_largest_component(G,strongly=True)
path=nx.shortest_path_length(G,a[0],a[1])
fig1_1, ax = ox.plot_graph_route(G, path, route_linewidth=6, node_size=0.5)
谢谢
I am currently developing an optimal delivery algorithm for parcel delivery. I have a question because I encountered a problem with the plot_graph_route() function of OSMNX while developing the program.
When I coded like the code below, I get a result of KeyError: 'length'.
Here is the error code.
"C:\Python38\lib\site-packages\osmnx\plot.py", line 303, in plot_graph_route
data = min(G.get_edge_data(u, v).values(), key=lambda d: d["length"])
File "C:\Python38\lib\site-packages\osmnx\plot.py", line 303, in <lambda>
data = min(G.get_edge_data(u, v).values(), key=lambda d: d["length"])
KeyError: 'length'
As a result of my testing, it is assumed that an error occurs between the two nodes in List A below. Both nodes are connected, and an error occurs even though I arbitrarily added an edge between the two nodes. The path between the nodes is the result obtained by using the netwokX's shortest_path_length() function.
this is my code
import networkx as nx
import osmnx as ox
import requests
import numpy as np
a= [1916534315,1916534308] #list_of_problem_node
G = ox.graph_from_place('Gumi, Gyeongsangbuk-do, Korea', network_type='drive')#graph of I want to find
########## for save and load convinience
# ox.save_graphml(G,'gumimap')
# G = ox.load_graphml('gumimap')
G.add_edge(1916534315,1916534308)
G.add_edge(1916534308,1916534315)
G=ox.utils_graph.get_largest_component(G,strongly=True)
path=nx.shortest_path_length(G,a[0],a[1])
fig1_1, ax = ox.plot_graph_route(G, path, route_linewidth=6, node_size=0.5)
thank you
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评论（1）
正如您的错误所暗示的那样，您的新边缘缺乏
长度属性，plot_graph_route函数需要。您可以手动添加它或使用add_edge_lengths函数。As your error suggests, your new edges lack a
lengthattribute, which theplot_graph_routefunction needs. You can add it manually or use theadd_edge_lengthsfunction. https://osmnx.readthedocs.io/en/stable/osmnx.html#osmnx.distance.add_edge_lengths