Python - 从包含 \n 和其他 unicode 的字符串打印可读格式？

Question

这个消息最初是一个集合，然后我用 str(a) 转换成字符串

a = "Let\u2019s trade!\n\u00a0\n\nAn Old Friendship, A New Day!\nHere comes the old, visiting at your home.\nIt comes with a new story, about how to live the present, about how in his past he did wrong.\n\nThe new day shines andx2"

由于某种原因，当我打印它时

print(a)

它保留所有的 \n 和 \u2019s 并且不会将其格式化为新行或将 \u2019 格式化为 " ' " 右引号.. 所以它只是以纯文本形式显示

Let\u2019s trade!\n\u00a0\n\nAn Old Friendship, A New Day!\nHere comes the old, visiting at your home.\nIt comes with a new story, about how to live the present, about how in his past he did wrong.\n\nThe new day shines andx2

通常如果我这样做

print("Let\u2019s trade!\n\u00a0\n\nAn Old Friendship, A New Day!\nHere comes the old, visiting at your home.\nIt comes with a new story, about how to live the present, about how in his past he did wrong.\n\nThe new day shines andx2")

它会输出为

Let’s trade!
 

An Old Friendship, A New Day!
Here comes the old, visiting at your home.
It comes with a new story, about how to live the present, about how in his 
past he did wrong.

The new day shines and

我该如何解决这个问题？

Answer 1

我认为您可能会将初始对象转换为 __repr__ 而不是 __str__。

差异看起来就像您正在经历的那样：

Python 3.6.5 (default, Mar 30 2018, 06:41:53)
>>> a = "Let\u2019s trade!\n\u00a0\n\nAn Old Friendship, A New Day!\nHere comes the old, visiting at your home.\nIt comes with a new story, about how to live the present, about how in his past he did wrong.\n\nThe new day shines andx2"
>>> print(a)
Let’s trade!


An Old Friendship, A New Day!
Here comes the old, visiting at your home.
It comes with a new story, about how to live the present, about how in 
his past he did wrong.

The new day shines andx2
>>> a_repr = repr(a)
>>> a_repr
"'Let’s trade!\\n\\xa0\\n\\nAn Old Friendship, A New Day!\\nHere comes the old, visiting at your home.\\nIt comes with a new story, about how to live the present, about how in his past he did wrong.\\n\\nThe new day shines andx2'"
>>> print(a_repr)
'Let’s trade!\n\xa0\n\nAn Old Friendship, A New Day!\nHere comes the old, visiting at your home.\nIt comes with a new story, about how to live the present, about how in his past he did wrong.\n\nThe new day shines andx2'

我会调查你是如何得到这个字符串的，并确保底层调用是str，而不是repr。