"The paths of the input and output files are defined. 'archivo_original' contains the path of the original CSV file to be processed, while 'archivo_errores' contains the path where the file containing the failed lines will be saved. Two empty lists are created: 'lineas_correctas' to store the lines in the original file that have the correct number of fields, and 'lineas_errores' to store the lines that have the wrong number of fields. An attempt is made to open the original file in read mode ('r') using a 'try-except' block to handle possible file opening errors. Each line of the file is cycled using a 'for' loop. Each line is divided into fields using the '|' separator and checked if the number of fields is equal to 59. If so, the line is added to the 'lineas_correctas' list; otherwise, 'lineas_errores' is added to the list. The contents of the 'lineas_errores' list are saved in a separate file using a 'with open' block in write mode ('w'). This ensures that the file closes properly after the lines are typed. The correct lines are converted into a DataFrame using a list understanding and the 'pd. DataFrame'. Each line is again split into fields using the '|' separator and a row is created in the DataFrame for each line. This resulting DataFrame, called a 'frame', will contain all the lines in the original file that have the correct number of fields. Finally, the function returns a value of 2 if executed successfully. Otherwise, it returns the error line along with an explanatory message of the error." library: sys, pandas