trying to find all the path in a graph using DFS recursive in Python

Question

I have found a solution that was posted some times ago and I have tried to apply it to my exercise but it doesn\'t work. I have a class graph that has nodes and edges and a

Answer 1

Since you only want to get all paths from start to end, the path is appended to your total path list when it reaches the end. The total list of paths is not returned but rather populated:

paths = []

def myDFS(graph,start,end,path=[]): 
    path=path+[start] 
    if start==end:
        paths.append(path) 
    for node in graph.childrenOf(start):
        if node not in path:
            myDFS(graph,node,end,path)

Answer 2

i've flattened JSON of nested dicts (depth was four)

{'output':
    'lev1_key1': 'v11',
    'lev1_key2': {
       {'lev2_key1': 'v21',
        'lev2_key2': 'v22',
       }
 }

with recursive call of

paths = []
_PATH_SEPARATOR = '/'
def flatten(treeroot, path=''):
  path=path
  if isinstance(treeroot, dict):
    for k in treeroot.keys():
        s_path = path + _PATH_SEPARATOR + str(k)
        flatten(treeroot[k], path=s_path)
  elif isinstance(treeroot, str):
     path = path + _PATH_SEPARATOR + treeroot
     paths.append(path)
  elif isinstance(treeroot, list):
    # if node has more than one child 
    for k in treeroot.keys():
        s_path = path + _PATH_SEPARATOR + str(k)
        flatten(k, path=s_path)

result is

{
 'output/lev1_key1': 'v11',
 'output/lev1_key2/lev2_key1': 'v21',
 'output/lev1_key2/lev2_key2': 'v22',
}