我能夠使用 networkx 填充網絡圖。我的問題是當我想突出顯示圖形無法生成的路徑（例如最短路徑）時，它將在下面返回錯誤。nx.draw_networkx_edges(Gr,pos,edgelist=path_edges,edge_color='r',width=10) File "/usr/local/lib/python3.6/site-packages/networkx/drawing/nx_pylab.py", line 578, in draw_networkx_edges if not edgelist or len(edgelist) == 0: # no edges!TypeError: object of type 'zip' has no len()我尋找解決方案，這是因為腳本在 python3 上運行，因此我收到此錯誤。解決方案之一是更改和添加如下列表。原來的：Gr = nx.DiGraph() edges = graphGr.add_edges_from(edges)pos = nx.spring_layout(Gr)path = nx.shortest_path(Gr,source=1,target=7)path_edges = zip(path,path[1:])nx.draw_networkx_nodes(Gr,pos,nodelist=path,node_color='r')nx.draw_networkx_edges(Gr,pos,edgelist=path_edges,edge_color='r',width=10)plt.axis('equal')plt.show()修改的：path = nx.shortest_path(Gr,source=1,target=7)path_edges = list(zip(path,path[1:]))nx.draw_networkx_nodes(Gr,pos,nodelist=path,node_color='r')nx.draw_networkx_edges(Gr,pos,edgelist=path_edges,edge_color='r',width=10)plt.axis('equal')plt.show()能夠運行腳本沒有錯誤并且能夠生成圖形，但突出顯示的路徑（紅色）未與拓撲節點和鏈接對齊。紅色路徑應在頂部并與節點/路徑 1-2-3-4-5-6-7 對齊。請參考下面的圖片
1 回答
慕仙森
TA貢獻1827條經驗 獲得超8個贊
我能夠使用以下代碼生成您似乎想要的圖表 - 如果您遇到任何問題，請告訴我。您需要將zip對象轉換為 a是正確的list，但我認為您的繪圖代碼中可能存在其他錯誤。nx.spring_layout如果您需要每次的輸出都相同，則可以使用seed關鍵字參數，例如pos = nx.spring_layout(Gr, seed=123).
代碼：
import networkx as nx
# Set up graph
Gr = nx.DiGraph()
edges = [(i+1, i+2) for i in range(10)] + [(i+2, i+1) for i in range(10)]
Gr.add_edges_from(edges)
# Get position using spring layout
pos = nx.spring_layout(Gr)
# Get shortest path
path = nx.shortest_path(Gr,source=1,target=7)
path_edges = list(zip(path,path[1:]))
# Draw nodes and edges not included in path
nx.draw_networkx_nodes(Gr, pos, nodelist=set(Gr.nodes)-set(path))
nx.draw_networkx_edges(Gr, pos, edgelist=set(Gr.edges)-set(path_edges), connectionstyle='arc3, rad = 0.3')
# Draw nodes and edges included in path
nx.draw_networkx_nodes(Gr, pos, nodelist=path, node_color='r')
nx.draw_networkx_edges(Gr,pos,edgelist=path_edges,edge_color='r', connectionstyle='arc3, rad = 0.3')
# Draw labels
nx.draw_networkx_labels(Gr,pos)
輸出：
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