FAQ: Graph Search: Python - A Graph Search with Real Depth

FAQ Python FAQ
#1

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This community-built FAQ covers the “A Graph Search with Real Depth” exercise from the lesson “Graph Search: Python”.

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FAQs on the exercise A Graph Search with Real Depth

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#2

Hello, there is something wrong with instruction 1. It says to define dfs with the parameters of (graph, current_vertex, target_value, visited=None) Which i did exactly as it should be but would not let me pass the instruction, attached is a screenshot of what i had before i pressed ‘solution’. It makes me sad that this happens sometimes because it’s encouraging to get the green check of awesomeness.
here is the solutions definition of the function (for comparison)

# Build your depth-first search function below:
def dfs(graph, current_vertex, target_value, visited=None):
  if visited == None:
    visited = []
  visited.append(current_vertex)
  return visited

print(dfs(None, "bees?", None))

Screenshot%20from%202019-02-15%2010-08-29
a871c2b3d993fce3720c8769364a960c88e39578.png1366×768 113 KB

1 Like
#3

By looking at your screenshot, your last parameter missing a letter i instead of vis"i"ted. :joy:

2 Likes
#4

Yeah, I was pretty bad about catching typos lol. Luckily that’s over with now, can’t develop a website with django and have typos lololol.

LESSON LEARNED

1 Like
#5

Why creating a default value of None, if it is to change it to something else if it is None?
Just put an empty list as default value…