def index_from_line(line):
        """Parse an index (integer) from command line args and return it."""
        try:
            index = int(line.split(' ')[0])
        except (ValueError, IndexError):
            print('Please enter an integer index as the first argument.')
            index = None
        return index
def index_from_line(line):
        
        try:
            index = int(line.split(' ')[0])
        except (ValueError, IndexError):
            print('Please enter an integer index as the first argument.')
            index = None
        return index
def index_from_line ( line ) : try : index = int ( line . split ( ' ' ) [ 0 ] ) except ( ValueError , IndexError ) : print ( 'Please enter an integer index as the first argument.' ) index = None return index
Parse an index (integer) from command line args and return it.
Parse an index ( integer ) from command line args and return it .