I will send you a code of Python function. You need to analyse the code and return to me a string that I can use as the docstring for that function, so as to improve my documentation. The functions can also be routes of a Web App, handle those cases too. Donot write any explanations, just send me a string that I can use as the docstring. The language style of the docstring should be simple and easy to understand and it should be in Google Style Multi-Line format
Here is the code:
def write_single_csv(spark_df, dbutils, base_path, output_filename, write_options):
    guid = str(uuid4())[:6]
    temp_dir = f"{base_path}/to_delete_{guid}"
    spark_df.coalesce(1).write.options(**write_options).csv(temp_dir)

    files = dbutils.fs.ls(temp_dir)
    output_file = [x for x in files if x.name.startswith("part-")]

    dbutils.fs.mv(output_file[0].path, f"{base_path}/{output_filename}")
    dbutils.fs.rm(temp_dir, True) In your response, include at most 3 words that are fully capitalized to emphasize key points.
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