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Selected yaml.Loader while reading odml documents #344

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Merged
mpsonntag merged 3 commits into from
Jan 17, 2020
+17 −2
Merged

Selected yaml.Loader while reading odml documents #344

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e6300b0
Selected yaml.Loader while reading odml documents
Aniket-Pradhan Jan 4, 2020
cf22795
Use SafeLoader instead of Loader to load yaml files
Aniket-Pradhan Jan 16, 2020
48e55a2
Added a method to serialize datetime.time objects as string objects
Aniket-Pradhan Jan 16, 2020
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19 changes: 17 additions & 2 deletions odml/tools/odmlparser.py
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Original file line number Diff line number Diff line change
Expand Up @@ -77,6 +77,7 @@ def to_string(self, odml_document):
'odml-version': FORMAT_VERSION}

if self.parser == 'YAML':
yaml.add_representer(datetime.time, YAMLTimeSerializer)
string_doc = yaml.dump(odml_output, default_flow_style=False)
elif self.parser == 'JSON':
string_doc = json.dumps(odml_output, indent=4,
Expand All @@ -88,6 +89,11 @@ def to_string(self, odml_document):
return string_doc


# Required to serialize datetime.time as string objects
def YAMLTimeSerializer(dumper, data):
return dumper.represent_scalar('tag:yaml.org,2002:str', str(data))


# Required to serialize datetime values with JSON.
class JSONDateTimeSerializer(json.JSONEncoder):
def default(self, o):
Expand Down Expand Up @@ -133,7 +139,10 @@ def from_file(self, file, doc_format=None):
elif self.parser == 'YAML':
with open(file) as yaml_data:
try:
self.parsed_doc = yaml.load(yaml_data)
yaml.SafeLoader.add_constructor(
"tag:yaml.org,2002:python/unicode",
UnicodeLoaderConstructor)
self.parsed_doc = yaml.safe_load(yaml_data)
except yaml.parser.ParserError as err:
print(err)
return
Expand Down Expand Up @@ -173,7 +182,7 @@ def from_string(self, string, doc_format=None):

elif self.parser == 'YAML':
try:
self.parsed_doc = yaml.load(string)
self.parsed_doc = yaml.safe_load(string)
except yaml.parser.ParserError as err:
print(err)
return
Expand All @@ -197,3 +206,9 @@ def from_string(self, string, doc_format=None):

self.doc = RDFReader().from_string(string, doc_format)
return self.doc


# Constructor for PyYAML to load unicode characters
# Needed only for < Python 3
def UnicodeLoaderConstructor(loader, node):
return node.value