我有以下python代码:
import networkx as nx
def cost(i, j, d, value1, value2):
# some operation involving all these values
return cost
# graph is a networkx graph
# src, dst are integers
# cost is a callable that is passed 3 values automatically i.e. src, dst and d
# d is a dictionary of edge weights
path = nx.dijkstra_path(graph, src, dst, weight=cost)
现在我想通过两个值value1,并value2给cost功能。
该networkx文件表示,weight可以接受恰好3参数的调用。但我需要value1和value2进行计算。如何才能做到这一点?
编辑 使用 functools 的解决方案效果很好。但是,我的函数在一个类中,如下所示:
import networkx as nx
import functools
class Myclass:
def cost(self, i, j, d, value2):
# some operation involving all these values
# also need self
# graph is a networkx graph
# src, dst are integers
# cost is a callable that is passed 3 values automatically i.e. src, dst and d
# d is a dictionary of edge weights
# path = nx.dijkstra_path(graph, src, dst, cost)
cost_partial = functools.partial(cost, self=self, value2=5)
path = nx.dijkstra_path(graph, src, dst, cost_partial)
使用这种方法,nx.dijkstra_path坚持分配src给self. 因此解释器抱怨self分配了多个值。我需要 self 来计算成本。
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