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Ticket #287 (new defect)

Opened 16 months ago

Last modified 4 days ago

Different behaviour for comment lines ending with "-" in YAML-Python2 and YAML-Python3

Reported by: NorHoy@… Owned by: xi
Priority: normal Component: pyyaml
Severity: normal Keywords:
Cc:

Description

If YAML-Input is:

# ------------
'11':
    a: aa
    b: bb
# ------------
'22':
    c: cc
    d: dd
# ------------

In Python-2 (2.7.3 with PyYAML-3.10.win32-py2.7) I get the result:

{'11': {'a': 'aa', 'b': 'bb'}, '22': {'c': 'cc', 'd': 'dd'}}

In Python-3 (3.2.1 with PyYAML-3.10.win32-py3.2) the result is:

Traceback (most recent call last):

File "<stdin>", line 1, in <module> File "C:\Sysware\Python3-32\lib\site-packages\yaml\init.py", line 94, in safe_load

return load(stream, SafeLoader?)

File "C:\Sysware\Python3-32\lib\site-packages\yaml\init.py", line 72, in load

return loader.get_single_data()

File "C:\Sysware\Python3-32\lib\site-packages\yaml\constructor.py", line 35, in get_single_data

node = self.get_single_node()

File "C:\Sysware\Python3-32\lib\site-packages\yaml\composer.py", line 36, in get_single_node

document = self.compose_document()

File "C:\Sysware\Python3-32\lib\site-packages\yaml\composer.py", line 58, in compose_document

self.get_event()

File "C:\Sysware\Python3-32\lib\site-packages\yaml\parser.py", line 118, in get_event

self.current_event = self.state()

File "C:\Sysware\Python3-32\lib\site-packages\yaml\parser.py", line 193, in parse_document_end

token = self.peek_token()

File "C:\Sysware\Python3-32\lib\site-packages\yaml\scanner.py", line 128, in peek_token

self.fetch_more_tokens()

File "C:\Sysware\Python3-32\lib\site-packages\yaml\scanner.py", line 220, in fetch_more_tokens

return self.fetch_value()

File "C:\Sysware\Python3-32\lib\site-packages\yaml\scanner.py", line 580, in fetch_value

self.get_mark())

yaml.scanner.ScannerError?: mapping values are not allowed here

in "C:E\Python2\Test\!_Allg\YAML_Daten_Test.yaml", line 2, column 5

If I put another character than "-" at the end of the comment lines, then the Python3-YAML works well! Perhaps there is a new interpretation of the "-" in the Python3-YAML-Version (continuation sign?), but I've found nothing about that in the YAML documentation.

Greetings ... Norbert Hoyer

By the way ... YAML for Python is a great work - congratulations!

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comment:10 Changed 7 days ago by liwa <dirosie46@…>

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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