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ruamel.yaml is a YAML parser/emitter that supports roundtrip preservation of comments, seq/map flow style, and map key order

Project description

ruamel.yaml

ruamel.yaml is a YAML 1.2 loader/dumper package for Python.

https://readthedocs.org/projects/yaml/badge/?version=stable

ChangeLog

0.13.2 (2016-11-28):
  • fix for comments after empty (null) values (reported by dsw2127 and cokelaer)

0.13.1 (2016-11-22):
  • optimisations on memory usage when loading YAML from large files (py3: -50%, py2: -85%)

0.13.0 (2016-11-20):
  • if load() or load_all() is called with only a single argument (stream or string) a UnsafeLoaderWarning will be issued once. If appropriate you can surpress this warning by filtering it. Explicitly supplying the Loader=ruamel.yaml.Loader argument, will also prevent it from being issued. You should however consider using safe_load(), safe_load_all() if your YAML input does not use tags.

  • allow adding comments before and after keys (based on StackOveflow Q&A by msinn)

0.12.18 (2016-11-16):
  • another fix for numpy (re-reported independently by PaulG & Nathanial Burdic)

0.12.17 (2016-11-15):
  • only the RoundTripLoader included the Resolver that supports YAML 1.2 now all loaders do (reported by mixmastamyk)

0.12.16 (2016-11-13):
  • allow dot char (and many others) in anchor name Fix issue 72 (reported by Shalon Wood)

  • Slightly smarter behaviour dumping strings when no style is specified. Single string scalars that start with single quotes or have newlines now are dumped double quoted: “‘abcnklm’” instead of:

    '''abc
    
      klm'''
0.12.14 (2016-09-21):
  • preserve round-trip sequences that are mapping keys (prompted by stackoverflow question 39595807 from Nowox)

0.12.13 (2016-09-15):
  • Fix for issue #60 representation of CommentedMap with merge keys incorrect (reported by Tal Liron)

0.12.11 (2016-09-06):
  • Fix issue 58 endless loop in scanning tokens (reported by Christopher Lambert)

0.12.10 (2016-09-05):
  • Make previous fix depend on unicode char width (32 bit unicode support is a problem on MacOS reported by David Tagatac)

0.12.8 (2016-09-05):
  • To be ignored Unicode characters were not properly regex matched (no specific tests, PR by Haraguroicha Hsu)

0.12.7 (2016-09-03):
  • fixing issue 54 empty lines with spaces (reported by Alex Harvey)

0.12.6 (2016-09-03):
  • fixing issue 46 empty lines between top-level keys were gobbled (but not between sequence elements, nor between keys in netsted mappings (reported by Alex Harvey)

0.12.5 (2016-08-20):
  • fixing issue 45 preserving datetime formatting (submitted by altuin) Several formatting parameters are preserved with some normalisation:

  • preserve ‘T’, ‘t’ is replaced by ‘T’, multiple spaces between date and time reduced to one.

  • optional space before timezone is removed

  • still using microseconds, but now rounded (.1234567 -> .123457)

  • Z/-5/+01:00 preserved

0.12.4 (2016-08-19):
  • Fix for issue 44: missing preserve_quotes keyword argument (reported by M. Crusoe)

0.12.3 (2016-08-17):
  • correct ‘in’ operation for merged CommentedMaps in round-trip mode (implementation inspired by J.Ngo, but original not working for merges)

  • iteration over round-trip loaded mappings, that contain merges. Also keys(), items(), values() (Py3/Py2) and iterkeys(), iteritems(), itervalues(), viewkeys(), viewitems(), viewvalues() (Py2)

  • reuse of anchor name now generates warning, not an error. Round-tripping such anchors works correctly. This inherited PyYAML issue was brought to attention by G. Coddut (and was long standing https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=515634) suppressing the warning:

    import warnings
    from ruamel.yaml.error import ReusedAnchorWarning
    warnings.simplefilter("ignore", ReusedAnchorWarning)
0.12.2 (2016-08-16):
0.12.0 (2016-08-16):
  • drop support for Python 2.6

  • include initial Type information (inspired by M. Crusoe)

0.11.15 (2016-08-07):
  • Change to prevent FutureWarning in NumPy, as reported by tgehring (“comparison to None will result in an elementwise object comparison in the future”)

0.11.14 (2016-07-06):
  • fix preserve_quotes missing on original Loaders (as reported by Leynos, bitbucket issue 38)

0.11.13 (2016-07-06):
  • documentation only, automated linux wheels

0.11.12 (2016-07-06):
  • added support for roundtrip of single/double quoted scalars using: ruamel.yaml.round_trip_load(stream, preserve_quotes=True)

0.11.0 (2016-02-18):
  • RoundTripLoader loads 1.2 by default (no sexagesimals, 012 octals nor yes/no/on/off booleans

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