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"""Read YAML from stdin and write JSON to stdout."""
from __future__ import annotations
import datetime
import json
import sys
from yaml import load
try:
from yaml import CSafeLoader as SafeLoader
except ImportError:
from yaml import SafeLoader
# unique ISO date marker matching the one present in importer.py
ISO_DATE_MARKER = 'isodate:f23983df-f3df-453c-9904-bcd08af468cc:'
def default(value):
"""Custom default serializer which supports datetime.date types."""
if isinstance(value, datetime.date):
return '%s%s' % (ISO_DATE_MARKER, value.isoformat())
raise TypeError('cannot serialize type: %s' % type(value))
json.dump(load(sys.stdin, Loader=SafeLoader), sys.stdout, default=default)
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