Getting PyYaml's `yaml.safe_load` to support `pathlib.Path`

yaml_pathlib_fun.py

import pathlib
import yaml

def _path_representer(dumper, data):
    return dumper.represent_scalar("!Path", str(data))

def _path_constructor(loader, node):
    value = loader.construct_scalar(node)
    return pathlib.Path(value)

yaml.add_multi_representer(pathlib.Path, _path_representer)
yaml.SafeLoader.add_constructor("!Path", _path_constructor)

d = dict(
    p1 = pathlib.Path("/foo/bar"),
    p2 = pathlib.Path("/baz/qux"),
    s1 = "this is just a string",
)
dumped = yaml.dump(d)
loaded = yaml.safe_load(dumped)
print(f"dumped:\n---\n{dumped}")
print(f"loaded:\n---\n{loaded}")

# dumped:
# ---
# p1: !Path '/foo/bar'
# p2: !Path '/baz/qux'
# s1: this is just a string
# 
# loaded:
# ---
# {'p1': PosixPath('/foo/bar'), 'p2': PosixPath('/baz/qux'), 's1': 'this is just a string'}