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#!/usr/bin/env python3
import sys
import yaml
def inputs(args):
if args:
for filename in args:
with open(filename) as f:
yield filename, f
else:
yield '-', sys.stdin
objs = []
for filename, f in inputs(sys.argv[1:]):
objs.append(yaml.safe_load(f))
yaml.safe_dump_all(objs, stream=sys.stdout, indent=4, default_flow_style=False)
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