Using yaml.dump() after yaml.load() creates different document for block and folded literals

[ceremcem@…]

Hi,

With folded and block scalars, a document can not be loaded into python code and then dumped as the same. Why?

What I expect is like that:

# original document
a: |
  this is an 
  example
  block

b: > 
  this is another
  example
  block

Using this code:

f = open(original_document)
result = yaml.dump(yaml.load(f.read()))
f.write(result)

Expected result:

# expected result document
a: |
  this is an 
  example
  block

b: > 
  this is another
  example
  block

# real result
a: 'this is an

  example

  block

  '
b: 'this is another example block

  '

Yes, there are some other questions on the web ( http://stackoverflow.com/questions/8640959/how-can-i-control-what-scalar-form-pyyaml-uses-for-my-data) but accepted answers does not satisfy my needs.

Am I missing something?