Spark - How to write a single csv file WITHOUT folder?

Question

Suppose that df is a dataframe in Spark. The way to write df into a single CSV file is

df.coalesce(1).write.option(\"header\", \"tru

Answer 1

A possible solution could be convert the Spark dataframe to a pandas dataframe and save it as csv:

df.toPandas().to_csv("/")