2.16 以指定列宽格式化字符串

问题

格式化长字符串

解决方案

使用 textwrap 模块来格式化字符串的输出。比如：

>>> import textwrap
>>> print(textwrap.fill(s, 70))
Look into my eyes, look into my eyes, the eyes, the eyes, the eyes,
not around the eyes, don't look around the eyes, look into my eyes,
you're under.

>>> print(textwrap.fill(s, 40))
Look into my eyes, look into my eyes,
the eyes, the eyes, the eyes, not around
the eyes, don't look around the eyes,
look into my eyes, you're under.

>>> print(textwrap.fill(s, 40, initial_indent='    '))
    Look into my eyes, look into my
eyes, the eyes, the eyes, the eyes, not
around the eyes, don't look around the
eyes, look into my eyes, you're under.

>>> print(textwrap.fill(s, 40, subsequent_indent='    '))
Look into my eyes, look into my eyes,
    the eyes, the eyes, the eyes, not
    around the eyes, don't look around
    the eyes, look into my eyes, you're
    under.

讨论

textwrap 模块对于字符串打印是非常有用的，特别是当你希望输出自动匹配终端大小的时候。 你可以使用 os.get_terminal_size() 方法来获取终端的大小尺寸。比如：

>>> import os
>>> os.get_terminal_size().columns
80

fill() 方法接受一些其他可选参数来控制tab，语句结尾等。