CODEWITHSUNDEEP
pythonpython-2.7yaml
Chameleon
Chameleon

Reputation: 10138

How to force Python yaml.YAMLObject to dump human readable format?

I want to improve YAML syntax to make human readable exchange format.

I have such code:

import yaml

class YamlFileLoader(yaml.Loader):
  pass

class YamlFileDumper(yaml.Dumper):
  pass

class YAMLPerson(yaml.YAMLObject):
  yaml_tag = u'!person'
  yaml_flow_style = False
  def __init__(self):
    self.first_name = u'John'
    self.last_name = u'Doe'

y = YAMLPerson()
print yaml.dump(y)

It produces little ugly output:

!person
first_name: !!python/unicode 'John'
last_name: !!python/unicode 'Doe'

How to transform this into nice human readable syntax like that:

person:
  first_name: 'John'
  last_name: 'Doe'

What minimal code I should add?

Upvotes: 2

Views: 1940

Answers (1)

AnilV
AnilV

Reputation: 56

Chameleon,

I reached your post through google, as I was also looking for the same. I found the answer and thought of sharing with you.

Use "default_flow_style=False", to make the output human readable. See the sample code.

import yaml

yaml_sample = """
  a: 1
  b:
    c: 3
    d: 4
"""

my_yaml = yaml.load(yaml_sample)

print "default style True == \n", yaml.dump(my_yaml)
print "default style False == \n", yaml.dump(my_yaml, default_flow_style=False)

Output,

default style True == 
a: 1
b: {c: 3, d: 4}

default style False == 
a: 1
b:
  c: 3
  d: 4

Upvotes: 3

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