Ticket #239 (new defect)

Opened 3 years ago

Last modified 10 months ago

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

Reported by: ceremcem@… Owned by: xi
Priority: high Component: pyyaml
Severity: normal Keywords: yaml.load block folded literals



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 

b: > 
  this is another

Using this code:

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

Expected result:

# expected result document
a: |
  this is an 

b: > 
  this is another
# real result
a: 'this is an



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?

Change History

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The second issue is that the emitter escapes non-ASCII characters even when all characters are printable (according to 'c-printable' in the YAML spec) when using an encoding (UTF8) that supports such characters. I don't find this as elegant as could be. Instead of the "Fran\xE7ais" output above, I would have hoped for the UTF8-encoded byte string Fran\xc3\xa7ais\n.

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