Printing lists in alphabetical order using .sort-CodePudding

Everything in my code is returning what i expect, until i get to the last portion. The sort method is not returning my list in alphabetical order. I keep trying different vectors of corrections, but am brand new to python/coding, and clearly don't have a grasp on what i need to do. Please help. How do i concatenate these strings then print them out in alphabetical order:

Dickens** Hardy** Tolstoy** Twain** Uris**

books = ['War and Peace', 'Huckleberry Finn', 'The Return of the Native', 'A     Christmas Carol', 'Exodus']
authors = ['Tolstoy', 'Twain', 'Hardy', 'Dickens' 'Uris']

authorBooks = []
   for i in range(len(books)):
   authorBooks = [authors[i]   ' wrote '   books[i]]
   authorBooks = list()
   while i < 4:
       print(''.join(authorBooks))
       break
authorBooks = []
for i in range(len(books)):
    authorBooks = [authors[i]   ' wrote '   books[i]]
    authorBooks = list()
    while i < 4:
        print(''.join(authorBooks))
        break

CodePudding user response：

there's a better way to concatenate one to one mapping lists with same indexes

books = ['War and Peace', 'Huckleberry Finn', 'The Return of the Native', 'A Christmas Carol', 'Exodus']
authors = ['Tolstoy', 'Twain', 'Hardy', 'Dickens', 'Uris']

concatenated = []
for x, y in zip(authors, books):
    concatenated.append("{} wrote {}".format(x,y))

concatenated.sort()
print("\n".join(concatenated))

CodePudding user response：

If their is no restriction around using the existing list you can simply add the string to the existing list and avoid creating new list altogether

books = ['War and Peace', 'Huckleberry Finn', 'The Return of the Native', 'A Christmas Carol', 'Exodus']
authors = ['Tolstoy', 'Twain', 'Hardy', 'Dickens', 'Uris']
books = sorted([authors[i]   ' wrote '   books[i] for i in range(len(authors))])
print(books)
###
['Dickens wrote A Christmas Carol', 'Hardy wrote The Return of the Native', 'Tolstoy wrote War and Peace', 'Twain wrote Huckleberry Finn', 'Uris wrote Exodus']

CodePudding user response：

Use sorted from the built-in functions to order them (to reverse the order just pass a further parameter reverse=True) and zip to make pairing. I assumed the both lists have the same size, otherwise zip will automatically drop the last values of the longest one. In the ordering I didn't not distinguish between upper and lower case characters, casefold().

books = ['War and Fish', 'War and Peace', 'Huckleberry Finn', 'The Return of the Native', 'A     Christmas Carol', 'Exodus']
authors = ['xxx', 'Tolstoy', 'Twain', 'Hardy', 'Dickens' 'Uris']

pairs = list(zip(books, authors))

order_by_books = sorted(pairs, key=lambda pair: pair[0].casefold())
order_by_author = sorted(pairs, key=lambda pair: pair[1].casefold())

print('By books name:')
for book, author in order_by_books:
    print(f'{author} wrote "{book}"')

print('By authors:')
for book, author in order_by_author:
    print(f'{author} wrote "{book}"')