使用 python3 打印字符串格式:如何从数组打印? [英] String format printing with python3: How to print from array?

问题描述

Python3 有超级 string.format 打印:

Python3 has the super string.format printing:

'{} {}'.format('one', 'two')

如果我的字符串在一个数组中，一种方法是输入它们:

If my strings are in an array, one way would be to type them out:

a = ['one','two']
'{} {}'.format(a[0],a[1])

但是如何从数组中打印，而不必输入每个元素?

But how can I print from an array, instead of having to type out each element?

例如，损坏的代码:

a = ['one','two']
'{} {}'.format(a)

给我一​​个预期的错误:IndexError: tuple index out of range

Gives me an expected error: IndexError: tuple index out of range

当然，使用 ','.join(a) 不会有帮助，因为它给出了一个字符串而不是 2 个.

Of course, playing with ','.join(a) won't help, because it gives one string rather than 2.

(或者有没有办法用 f 字符串更好地做到这一点?)

(Or is there a way to do this better with f-strings?)

为了全面公开，我使用原始字符串是因为它具有一些几何意义，而我的真实代码如下所示:

And for full-disclosure, I'm using a raw-string because it has some geometrical significance, and my real code looks like this:

hex_string = r'''
            _____
           /     \
          /       \
    ,----(    {}    )----.
   /      \       /      \
  /   {}    \_____/   {}    \
  \        /     \        /
   \      /       \      /
    )----(    {}    )----(
   /      \       /      \
  /        \_____/        \
  \   {}    /     \   {}    /
   \      /       \      /
    `----(    {}    )----'
          \       /
           \_____/
'''

letters = list('1234567')

print(hex_string.format(letters[0], letters[1], letters[2], letters[3], letters[4], letters[5], letters[6]))

推荐答案

使用 解包以在函数调用期间扩展数组.

Use unpacking to expand the array during the function call.

print(hex_string.format(*letters))

输出:

            _____
           /     \
          /       \
    ,----(    1    )----.
   /      \       /      \
  /   2    \_____/   3    \
  \        /     \        /
   \      /       \      /
    )----(    4    )----(
   /      \       /      \
  /        \_____/        \
  \   5    /     \   6    /
   \      /       \      /
    `----(    7    )----'
          \       /
           \_____/

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