python yaml - ghdrako/doc_snipets GitHub Wiki

serialize list to yaml using dump

import yaml

users = [{'name': 'John Doe', 'occupation': 'gardener'},
         {'name': 'Lucy Black', 'occupation': 'teacher'}]

print(yaml.dump(users))

- name: John Doe
  occupation: gardener
- name: Lucy Black
  occupation: teacher

serialize to file

#!/usr/bin/env python3

import yaml

users = [{'name': 'John Doe', 'occupation': 'gardener'},
         {'name': 'Lucy Black', 'occupation': 'teacher'}]

with open('users.yaml', 'w') as f:
    
    data = yaml.dump(users, f)

Read yaml

#!/usr/bin/env python3

import yaml

with open('items.yaml') as f:
    
    data = yaml.load(f, Loader=yaml.FullLoader) # The FullLoader parameter handles the conversion from YAML
                                                # scalar values to Python the dictionary format
                                                # the same using full_load()
                                                # yaml.full_load(file)
    print(data)

    sorted = yaml.dump(data, sort_keys=True)
    print(sorted)

#!/usr/bin/env python3

import yaml

with open('items.yaml') as f:
    
    data = yaml.scan(f, Loader=yaml.FullLoader)

    for token in data:
        print(token)