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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def add_jars(jars):
 """Add external jars to the pyspark interpreter. Set the PYSPARK_SUBMIT_ARGS properly. Parameters jars: list of path to jars in string format """


    #if the parameter is a string, convert to a single element list
    if isinstance(jars,str):
        jars = [jars]

    _add_to_submit_args("--jars "+ ",".join(jars)  +" pyspark-shell")