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# -*- coding: utf-8 -*-
""" Tablib - YAML Support.
"""
import sys
try:
import yaml
except ImportError:
if sys.version_info[0] > 2:
import tablib.packages.yaml3 as yaml
else:
import tablib.packages.yaml as yaml
import tablib
title = 'yaml'
extensions = ('yaml', 'yml')
def export_set(dataset):
"""Returns YAML representation of Dataset."""
return yaml.safe_dump(dataset._package(ordered=False))
def export_book(databook):
"""Returns YAML representation of Databook."""
return yaml.safe_dump(databook._package(ordered=False))
def import_set(dset, in_stream):
"""Returns dataset from YAML stream."""
dset.wipe()
dset.dict = yaml.safe_load(in_stream)
def import_book(dbook, in_stream):
"""Returns databook from YAML stream."""
dbook.wipe()
for sheet in yaml.load(in_stream):
data = tablib.Dataset()
data.title = sheet['title']
data.dict = sheet['data']
dbook.add_sheet(data)
def detect(stream):
"""Returns True if given stream is valid YAML."""
try:
_yaml = yaml.safe_load(stream)
if isinstance(_yaml, (list, tuple, dict)):
return True
else:
return False
except (yaml.parser.ParserError, yaml.reader.ReaderError,
yaml.scanner.ScannerError):
return False
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