Adding data to a YAML file using Python

I am trying to write a dictionary value to a YAML file.

The dictate is:



Update code:

with open(backend_config_file,'w')as yaml_file:
            yaml_file.write(yaml.dump(data_dict , default_flow_style=False))


The problem is it will always overwrite the YAML file and not add the dictionary.

Is there a way to add the data or the data should be treated like the dict itself and the resulting dictionary, fully preserved?


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