python - "TypeError: 'in <string>' requires string as left operand, not int" when using graphviz dot layout -


i'm trying use pygraphviz' dot layout networkx. error

 file "c:\users\msi\anaconda3\lib\site-packages\pyparsing.py", line 1028, in preparse     while loc < instrlen , instring[loc] in wt: typeerror: 'in <string>' requires string left operand, not int

could graphviz not work python 3. i'm using?

here code:

import networkx nx import matplotlib.pyplot plt  g=nx.digraph()  n = [1,2,3,4,5,6,7,8,9,10,11,12,13,14] e = [(1,2),(1,3),(2,4),(2,5),(3,6),(3,7),      (8,9),(8,10),(9,11),(9,12),(10,13),(10,14),(7,8)]  g.add_nodes_from(n) g.add_edges_from(e)  pos=nx.graphviz_layout(g,prog='dot') nx.draw(g, pos=pos, with_labels=true) plt.show()


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