Question

我对PEP 8中的样式有疑问（或者将每行中的字符数减少到更小）。

考虑到我有一个book带有一堆不同的属性，我想将它们连接成一些String。

books = [book_1, book_2, book_3]
for b in books:
  print("Thank you for using our Library! You have decided to borrow %s on %s. Please remember to return the book in %d calendar days on %s" %    
  (book.title, book.start_date, book.lend_duration, book.return_date"))

如何缩短此行以确保其可读性？

任何想法都会有所帮助。 PEP 8只是一个想法。

Answer 1

您可以将字符串移出循环，然后在打印前对其进行格式化，如下所示：

message = 'Thank you for using our Library! You have decided to borrow {0.title} \
           on {0.start_date}. Please remember to return the book in \
           {0.lend_duration} calendar days on {0.return_date}'

for i in books:
    print(message.format(i))

Answer 2

由于在任何其他答案中都没有提及，您可以使用parenenthesis 而不使用使用+或\：

>>> ("hello"
     " world")
'hello world'

与Burhan's answer结合使用：

message = ('Thank you for using our Library! You have decided to borrow'
           ' {0.title} on {0.start_date}. Please remember to return the'
           ' book in {0.lend_duration} calendar days on {0.return_date}')

for b in books:
    print(message.format(b))

Answer 3

像这样输入一个新行。另见：Is it possible to break a long line to multiple lines in Python

books = [book_1, book_2, book_3]
for b in books:
  print("Thank you for using our Library! You have decided to borrow %s on %s." \
        "Please remember to return the book in %d calendar days on %s" % \   
        (book.title, book.start_date, book.lend_duration, book.return_date"))

Answer 4

尝试这种方法：

print(("Thank you for using our Library! You have decided to borrow {} " 
       + "on {}. Please remember to return the book in {} calendar days" 
       + "on {}").format(book.title, book.start_date, book.lend_duration,
                         book.return_date)

请注意，字符串连接位于parens内部，允许您格式化结果字符串。

符合长线以适应PEP 8

4 个答案: