I'm trying to iterate through a directory of multiple YAML files. My goal is to all merge them together, or rather, **append** them. My current solution requires me to load a 'placeholder.yml' file, which i then populate with the files in the directory. Here's the code:

```py
import yaml
from yaml import Loader
import os

def yaml_loader(filepath):
    # Loads a yaml file
    with open(filepath, 'r') as file_descriptor:
        data = yaml.load(file_descriptor, Loader)
    return data

rootdir = './yaml_files'
generated_yaml = yaml_loader('./yaml_files/placeholder.yml')
for subdir, dirs, files in os.walk(rootdir):
    for file in files:
        data = yaml_loader(os.path.join(subdir, file))
        generated_yaml.update(data)

print(generated_yaml)

```

This solution is not satisfactory as the placeholder.yml and must hold at least one value.
Is there a way to generate an empty YAML object for me to populate with the data i collect in my directory?
Also, if you know of any Libary that would suit this requirement, please let me know

Thanks in advance