scalar value of escaped double-newline parsed as a single newline

[anonymous]

When parsing the following: terminator : "\n\n"

The value of the right side scalar is returned as \n, rather than \n\n. Likewise, four newlines ("\n\n\n\n") is parsed as three ("\n\n\n").

[xi]

It works fine for me both with pure Python PyYAML and LibYAML bindings:

>>> import yaml
>>> yaml.load(r'terminator : "\n\n"')
{'terminator': '\n\n'}
>>> yaml.load(r'terminator : "\n\n"', Loader=yaml.CLoader)
{'terminator': '\n\n'}

Could you post a code snippet and a YAML file that produce the problem?

[anonymous]

Here is a code example that illustrates the problem. Look at the 3 newlines following the 'terminator' scalar. They end up being returned as 2 newlines.

[xi]

Is \n in your examples a new line character or just two symbols: \ and n? PyYAML and LibYAML handle these cases differently:

>>> import yaml
>>> yaml.load('"\n\n"') # two new line characters
'\n'
>>> yaml.load(r'"\n\n"') # four characters: \ n \ n
'\n\n'

In the both cases, PyYAML output is correct, see  http://yaml.org/spec/cvs/current.html#line%20folding/ and  http://yaml.org/spec/cvs/current.html#ns-esc-char.

When N(>1) subsequent new line characters occur in a flow scalar, they are "folded" into N-1 new line characters. A single new line character is replaced with space.