Ticket #183: yaml_test.py

# -*- coding: utf-8 -*-

import yaml
from yaml import events

binarydata = [chr(i) for i in xrange(256) ]
binarydata = "".join(binarydata)
print "binarydata: %r" % (binarydata, )

def dump_dict(dumper,  d):
    dumper.emit( events.MappingStartEvent(anchor=None, tag=None, implicit=True) )
    
    for k, v in d.items():
        dumper.emit( events.ScalarEvent(anchor=None, tag=None, implicit=(True, False), value=k) )
        dumper.emit( events.ScalarEvent(anchor=None, tag=None, implicit=(True, False), value=v) )

    dumper.emit( events.MappingEndEvent() )
    
    
dump_fn = "test.yaml"
print ("Saving to file: %r " % (dump_fn, ))
dumpf = open(dump_fn, "wb")
# http://pyyaml.org/wiki/PyYAMLDocumentation
dumper = yaml.CSafeDumper(dumpf)

# dumper.emit( yaml.StreamStartEvent(encoding='utf-8') )
# dumper.emit( yaml.DocumentStartEvent() )
dumper.open()

# dumper.emit( yaml.events.StreamStartEvent() )
dumper.emit( events.DocumentStartEvent() )

# MappingStartEvent(anchor=None, tag=None, implicit=True)
dumper.emit( events.MappingStartEvent(anchor=None, tag=None, implicit=True) )

dumper.emit( events.ScalarEvent(anchor=None, tag=None, implicit=(True, False), value='1') )
dumper.emit( events.ScalarEvent(anchor=None, tag=None, implicit=(True, False), value='one') )

dumper.emit( events.ScalarEvent(anchor=None, tag=None, implicit=(True, False), value='2') )
dump_dict(dumper,  {"intro":"intro_value",  "desc": "long description",  "multiline": "line 1\nline2\nline3\n",  "binary": binarydata })

dumper.emit( events.MappingEndEvent() )


dumper.emit( events.DocumentEndEvent(explicit=True) )
# dumper.emit( yaml.StreamEndEvent() )
dumper.close()