def widest_colum(list_name): 
    """ Finds the longest word in each sublist. 
    Returns a list with the width of each column.""" 

    col_witdths = [0] * len(list_name) 

    i = 0
    for column in list_name:
        longest_word = 0

        for word in column:
            if len(word) > longest_word:
                longest_word = len(word)
         
        col_witdths[i] = longest_word
        i += 1
    
    return col_witdths