How can I write data in YAML format in a file?

Question

I need to write the below data to yaml file using Python:

{A:a, B:{C:c, D:d, E:e}} 

i.e., dictionary in a dictionary. How can I achieve thi

Answer 1

Link to the PyYAML documentation showing the difference for the default_flow_style parameter. To write it to a file in block mode (often more readable):

d = {'A':'a', 'B':{'C':'c', 'D':'d', 'E':'e'}}
with open('result.yml', 'w') as yaml_file:
    yaml.dump(d, yaml_file, default_flow_style=False)

produces:

A: a
B:
  C: c
  D: d
  E: e