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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def dump(data, stream=None, **kwds):
 """ Serialize a Python object into a YAML stream. If stream is None, return the produced string instead. Dict keys are produced in the order in which they appear in OrderedDicts. Safe version. If objects are not "conventional" objects, they will be dumped converted to string with the str() function. They will then not be recovered when loading with the load() function. """


    # Display OrderedDicts correctly
    class OrderedDumper(SafeDumper):
        pass

    def _dict_representer(dumper, data):
        return dumper.represent_mapping(
            original_yaml.resolver.BaseResolver.DEFAULT_MAPPING_TAG,
            list(data.items()))

    # Display long strings correctly
    def _long_str_representer(dumper, data):
        if data.find("\n") != -1:
            # Drop some uneeded data
            # \t are forbidden in YAML
            data = data.replace("\t", "    ")
            # empty spaces at end of line are always useless in INGInious, and forbidden in YAML
            data = "\n".join([p.rstrip() for p in data.split("\n")])
            return dumper.represent_scalar('tag:yaml.org,2002:str', data, style='|')
        else:
            return dumper.represent_scalar('tag:yaml.org,2002:str', data)

    # Default representation for some odd objects
    def _default_representer(dumper, data):
        return _long_str_representer(dumper, str(data))

    OrderedDumper.add_representer(str, _long_str_representer)
    OrderedDumper.add_representer(str, _long_str_representer)
    OrderedDumper.add_representer(OrderedDict, _dict_representer)
    OrderedDumper.add_representer(None, _default_representer)

    s = original_yaml.dump(data, stream, OrderedDumper, encoding='utf-8', allow_unicode=True, default_flow_style=False, indent=4, **kwds)

    if s is not None:
        return s.decode('utf-8')
    else:
        return