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It makes it more convenient to use PyYAML.

Project description

Enhanced PyYAML

It makes PyYAML more convenient and avoids duplicate YAML data.

Here is the features:

  • by deafult, use name of class as the yaml_tag of YAMLObject
  • load anchor & as an attribute anchor of YAMLObject instance
  • dump the attribute anchor of YAMLObject instance as the anchor & name


You can install it via PyPI,

sudo pip install enhancedyaml

or download it manually.


Here is the yaml file:

# examples/enhanced_data.yaml

%YAML 1.1
    - !Example &first
        data: I am the first one.
    - !Example &second
        data: I am the second one.
    - \*first
    - \*second

Create an YAMLObject without specifiying yaml_tag

import enhancedyaml

class Example(enhancedyaml.YAMLObject): pass

Loaded YAML


from pprint import pprint

data = enhancedyaml.load(open('data/enhanced_data.yaml'))


{'examples': [<__main__.Example object at 0x7fa825fb4fd0>,

              <__main__.Example object at 0x7fa825fb4cd0>],
 'order': [<__main__.Example object at 0x7fa825fb4fd0>,
           <__main__.Example object at 0x7fa825fb4cd0>]}

Content of data[‘order’]


pprint(list(example.__dict__ for example in data['order']))


[{'anchor': u'first', 'data': 'I am the first one.'},
 {'anchor': u'second', 'data': 'I am the second one.'}]

Example has addational attribute anchor.

Dump Data Again


print enhancedyaml.dump(data, default_flow_style=False)


- &first !Example
  data: I am the first one.
- &second !Example
  data: I am the second one.
- \*first
- \*second

It is almost same as the original YAML.

Dump Objects Which are Generated in Runtime


e1 = Example()
e2 = Example() = "I don't have `anchor`." = "I don't have `anchor`, too."
es = [e1, e2, e2, e1]
print enhancedyaml.dump(es, default_flow_style=False)


- &example002 !Example
  data: I don't have `anchor`.
- &example001 !Example
  data: I don't have `anchor`, too.
- \*example001
- \*example002

You can find more examples in enhancedyaml/examples directory.

Have fun!

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Files for enhancedyaml, version v0.1.1
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