Question

我遇到了python问题。我一直得到同样的错误：

Traceback (most recent call last):  
  File "F:\test4", line 21, in <module>  
    graph = dict([(label, node(label))] for label in node_labels)  
  File "F:\test4", line 21, in <genexpr>  
    graph = dict([(label, node(label))] for label in node_labels)  
NameError: global name 'node' is not defined

# open network.txt and populate nodes and close file
network_file = open("network.txt", "r")
lines = [line.strip() for line in network_file]
network_file.close()
print (len(lines))


# edges which will be populated with information in network.txt
edges = []                      # list of <label, label, distance> triples
node_labels = set()             # set of node labels
graph = {}                      # dictionary of nodes keyed by labels

for line in lines:
    strNode, strNeighbor, strMetric = line.split()[:3]
    intMetric = int(strMetric)

    edges.append((strNode, strNeighbor, intMetric))
    node_labels.update([strNode, strNeighbor])

# create graph
graph = dict([(label, node(label))] for label in node_labels)

直到这一行，我找不到全局变量节点的任何问题，它应该可以工作。

谢谢！

Answer 1

在最后一行，您正在呼叫node(label)。您是否定义了函数node？

Answer 2

为什么要这样？节点在你展示的代码中没有定义...也许你忘记了导入？

python全球名称

2 个答案: