Papillon6814
How to convert charlist to string?
Hello. I’m working on running python file by elixir.
The python file returns dict, and elixir parses it as map. But its keys are charlists like this:
%{'graph' => {:"$erlport.opaque", :python, <<128, 2, 99, 110, 101, 111, 52, 106, 46, 103, 114, 97, 112, 104, 10, 71, 114, 97, 112, 104, 10, 113, 0, 41, 129, 113, 1, 125, 113, 2, 40, 88, 6, 0, 0, 0, 95, 110, 111, 100, 101, 115, 113, 3, 125, 113, ...>>}, 'id' => 7, 'labels' => ...
I have never seen a map which has charlist keys, so I’d like to convert the key to string, but I don’t still find a good way to do it. Do you have an idea for it? Thank you 
Marked As Solved
hst337
What library do use for interactions with Python? I think it might have an option to return binaries instead of charlists
But until then you can just charlist = 'abc'; string = "#{charlist}" or use to_string. To traverse maps, you can use Map.new()
So, to convert one map, you should write something like
Map.new(old_map, fn
{list, value} when is_list(list) ->
key =
try do
"#{list}"
except
# In case it's not a charlist
_ -> list
end
{key, value}
other ->
other
end)Also Liked
adamu
This code is pretty defensive. I’d probably do:
Map.new(map, fn {k, v} -> {List.to_string(k), v} end)
And let List.to_string/1 handle the edge-cases.
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