How to read a python tuple using PyYAML?

I wouldn’t call what you’ve done hacky for what you are trying to do. Your alternative approach from my understanding is to make use of python-specific tags in your YAML file so it is represented appropriately when loading the yaml file. However, this requires you modifying your yaml file which, if huge, is probably going to be pretty irritating and not ideal.

Look at the PyYaml doc that further illustrates this. Ultimately you want to place a !!python/tuple in front of your structure that you want to represented as such. To take your sample data, it would like:

YAML FILE:

cities:
  1: !!python/tuple [0,0]
  2: !!python/tuple [4,0]
  3: !!python/tuple [0,4]
  4: !!python/tuple [4,4]
  5: !!python/tuple [2,2]
  6: !!python/tuple [6,2]
highways:
  - !!python/tuple [1,2]
  - !!python/tuple [1,3]
  - !!python/tuple [1,5]
  - !!python/tuple [2,4]
  - !!python/tuple [3,4]
  - !!python/tuple [5,4]
start: 1
end: 4

Sample code:

import yaml

with open('y.yaml') as f:
    d = yaml.load(f.read())

print(d)

Which will output:

{'cities': {1: (0, 0), 2: (4, 0), 3: (0, 4), 4: (4, 4), 5: (2, 2), 6: (6, 2)}, 'start': 1, 'end': 4, 'highways': [(1, 2), (1, 3), (1, 5), (2, 4), (3, 4), (5, 4)]}