yaml.dump appends a line at the end of the file

Hello,

yaml.dump() adds a new line at the end of a file. here an example to illustrate my problem.

test.yaml

foo:
  bar: hello
  loul: world

No new line after loul: world

from pathlib import Path

import yaml

def read_text():
    with open("test.yaml") as file:
        data = yaml.safe_load(file)
    
    with open("test2.yaml", mode="w") as file:
        yaml.safe_dump(data, file, default_flow_style=False, sort_keys=False)

    file_text = Path("test.yaml").read_text()
    new_file_text = Path("test2.yaml").read_text()
    
    assert file_text == new_file_text
    # Raise AssertionError

if __name__ == '__main__':
    read_text()

test2.yaml

foo:
  bar: hello
  loul: world
# this line is added

Is this correct ?

[perlpunk]

YAML files with missing final linebreaks are actually valid. It’s just that PyYAML does not keep this information (or any other spaces or comments) when loading.

[NargiT]

Is there a way to raise an error at load time to verify if the original file is no valid from yaml point of view?