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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 parseGTF(inGTF):
 """ Reads an extracts all attributes in the attributes section of a GTF and constructs a new dataframe wiht one collumn per attribute instead of the attributes column :param inGTF: GTF dataframe to be parsed :returns: a dataframe of the orignal input GTF with attributes parsed. """


    desc=attributesGTF(inGTF)
    ref=inGTF.copy()
    ref.reset_index(inplace=True, drop=True)
    df=ref.drop(['attribute'],axis=1).copy()
    for d in desc:
        field=retrieve_GTF_field(d,ref)
        df=pd.concat([df,field],axis=1)
    return df