# -*- coding: utf-8 -*- #Copyright (C) 2012 Red Hat, Inc. # #Permission is hereby granted, free of charge, to any person obtaining #a copy of this software and associated documentation files (the #"Software"), to deal in the Software without restriction, including #without limitation the rights to use, copy, modify, merge, publish, #distribute, sublicense, and/or sell copies of the Software, and to #permit persons to whom the Software is furnished to do so, subject to #the following conditions: # #The above copyright notice and this permission notice shall be included #in all copies or substantial portions of the Software. # #THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS #OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF #MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. #IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY #CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, #TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE #SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. """ Easy YAML serialisation compatible with TAP format. Port of `Data::YAML Perl module `, satisfying all its tests, intended to be used for support of `TAP ` data format. Port of the original documentation follows. The syntax accepted by this module is a subset of `YAML `. =========== YAML syntax =========== Although YAML appears to be a simple language, the entire YAML specification is huge. This module implements a small subset of the complete syntax trading completeness for compactness and simplicity. This restricted syntax is known (to me at least) as 'YAMLish'. These examples demonstrates the full range of supported syntax. All YAML documents must begin with '---' and end with a line containing '...'. :: --- Simple scalar ... Unprintable characters are represented using standard escapes in double quoted strings. :: --- "\\t\\x01\\x02\\n" ... Array and hashes are represented thusly :: --- - "This" - "is" - "an" - "array" ... --- This: is a: hash ... Structures may nest arbitrarily :: --- - name: 'Hash one' value: 1 - name: 'Hash two' value: 2 ... Undef is a tilde :: --- ~ ... ==== Uses ==== This module may be used any time you need to freeze and thaw Python data structures into a human readable format. The output from `yamlish.dump()` should be readable by any YAML parser. The original Perl module was originally written to allow machine-readable diagnostic information to be passed from test scripts to the Perl module `TAP::Harness`. That means that if you're writing a testing system that needs to output TAP version 13 or later syntax you might find this module useful. Read more about TAP and YAMLish on `` """ from __future__ import absolute_import, print_function, unicode_literals import logging import yaml import sys class NullHandler(logging.Handler): def emit(self, record): pass log = logging.getLogger("yamlish") log.addHandler(NullHandler()) #log.setLevel(logging.DEBUG) __docformat__ = 'reStructuredText' __version__ = "0.10" __author__ = u"Matěj Cepl " py3k = sys.version_info[0] > 2 try: isinstance('a', basestring) except NameError: basestring = (bytes, str) class _YamlishLoader(yaml.loader.SafeLoader): """ Remove a datetime resolving. YAMLish returns unchanged string. """ def __init__(self, stream): yaml.loader.SafeLoader.__init__(self, stream) @classmethod def remove_implicit_resolver(cls, tag): """ Remove an implicit resolver from a Loader class identified by its tag. """ if not 'yaml_implicit_resolvers' in cls.__dict__: cls.yaml_implicit_resolvers = cls.yaml_implicit_resolvers.copy() for key in cls.yaml_implicit_resolvers: resolvers_set = cls.yaml_implicit_resolvers[key] for idx in range(len(resolvers_set)): if resolvers_set[idx][0] == tag: del resolvers_set[idx] if len(resolvers_set) == 0: del cls.yaml_implicit_resolvers[key] _YamlishLoader.remove_implicit_resolver(u'tag:yaml.org,2002:timestamp') class _YamlishDumper(yaml.dumper.SafeDumper): pass def str_representer_compact_multiline(dumper, data): style = None if not py3k and isinstance(data, str): # assumes all your strings are UTF-8 encoded data = data.decode('utf-8') if '\n' in data: style = '|' tag = u'tag:yaml.org,2002:str' return dumper.represent_scalar(tag, data, style) if py3k: yaml.add_representer(bytes, str_representer_compact_multiline, Dumper=_YamlishDumper) yaml.add_representer(str, str_representer_compact_multiline, Dumper=_YamlishDumper) else: yaml.add_representer(str, str_representer_compact_multiline, Dumper=_YamlishDumper) yaml.add_representer(unicode, str_representer_compact_multiline, Dumper=_YamlishDumper) def load(source, ignore_wrong_characters=False): """ Return object loaded from a YAML document in source. Source is either a representation of the YAML document itself or any document providing an iterator (that includes file, list, and many others). """ out = None log.debug("inobj: (%s)\n%s", type(source), source) log.debug('before ignore_wrong_characters = %s', ignore_wrong_characters) if isinstance(source, basestring): out = yaml.load(source, Loader=_YamlishLoader) log.debug("out (string) = %s", out) elif hasattr(source, "__iter__"): inobj = [] for line in source: try: if not py3k or isinstance(line, bytes): line = line.decode('utf8') logging.debug('inobj, line ... %s, %s', type(inobj), type(line)) inobj.append(line) except UnicodeDecodeError: log.debug('in ignore_wrong_characters = %s', ignore_wrong_characters) if ignore_wrong_characters: inobj.append(line.decode('utf8', 'ignore')) else: raise log.debug('restarting load with inobj as string') out = load('\n'.join(inobj), ignore_wrong_characters) log.debug("out (iter) = %s", out) log.debug("out (iter) = type %s", type(out)) return out def dump(source, destination): """ Store source in destination file. Destination is either a file object or a string with a filename. """ if isinstance(destination, basestring): with open(destination, "w") as outf: dump(source, outf) elif hasattr(destination, "fileno"): yaml.dump(source, destination, encoding="utf-8", default_flow_style=False, canonical=False, Dumper=_YamlishDumper) else: raise NameError def dumps(source): """ Return YAMLish string from given source. """ return yaml.dump(source, encoding=None, explicit_start=True, explicit_end=True, default_flow_style=False, default_style=False, canonical=False, Dumper=_YamlishDumper)