如何修复 ModuleNotFoundError: No module named

Question

这是一个简短的python脚本：import matplotlib.pyplot as pltimport networkx as nxfrom networkx.drawing.nx_agraph import graphviz_layoutG = nx.DiGraph()当它由普通 python 执行时，它给出了以下堆栈跟踪：Traceback (most recent call last):  File "python/spikes/networkx.py", line 17, in <module>    import networkx as nx  File "/home/peng/git/mxnet-spike/python/spikes/networkx.py", line 18, in <module>    from networkx.drawing.nx_agraph import graphviz_layoutModuleNotFoundError: No module named 'networkx.drawing'; 'networkx' is not a package什么可能导致这种情况？python解释器有缺陷吗？