scalar_type_to_tag = {
    str: 'tag:yaml.org,2002:str',
    int: 'tag:yaml.org,2002:int',
    float: 'tag:yaml.org,2002:float',
    bool: 'tag:yaml.org,2002:bool',
    None: 'tag:yaml.org,2002:null',
    type(None): 'tag:yaml.org,2002:null'
}
