代码实例：
sample_text = '''
The textwrap module can beused to format text for output in
situations wherepretty-printing is desired. It offers
programmatic functionalitysimilar to the paragraph wrapping
or filling features found inmany text editors.
'''
段落填充：
import textwrap from textwrap_exampleimport sample_text print 'Nodedent:\n' printtextwrap.fill(sample_text, width=50)
The textwrap module can be used to format
text for outputin situations where pretty-
printing is desired. It offers programmatic
functionalitysimilar to the paragraph wrapping
or fillingfeatures found in many text editors.
结果为左对齐，第一行有缩进。行中的空格继续保留。
移除缩进：
import textwrap fromtextwrap_example import sample_text dedented_text = textwrap.dedent(sample_text) print 'Dedented:' printdedented_text
The textwrapmodule can be used to format text for output in
situations wherepretty-printing is desired. It offers
programmaticfunctionality similar to the paragraph wrapping
or fillingfeatures found in many text editors.
这样第一行就不会缩进。
结合移除缩进和填充：
import textwrap
fromtextwrap_example import sample_text
dedented_text =textwrap.dedent(sample_text).strip()
for width in [ 45,70 ]:
print '%d Columns:\n' % width
print textwrap.fill(dedented_text,width=width)
print The textwrapmodule can be used to format text for output in
situations wherepretty-printing is desired. It offersprogrammatic
functionality similarto the paragraph wrapping or filling features
found in many texteditors.
悬挂缩进：悬挂缩进第一行的缩进小于其他行的缩进。
import textwrap
fromtextwrap_example import sample_text
dedented_text =textwrap.dedent(sample_text).strip()
printtextwrap.fill(dedented_text,
initial_indent='',
subsequent_indent=' ' * 4,
width=50,
)
执行结果：
# pythontextwrap_hanging_indent.py
The textwrapmodule can be used to format text for
output in situations where pretty-printingis
desired. It offers programmatic functionality
similar to the paragraph wrapping orfilling
features found in many text editors. textwrap.fill(text[,width[, ...]])
包装单段文字，并返回包含包裹段落的字符串。实际上是"\n".join(wrap(text,...))的缩写。wrap() and fill()创建TextWrapper实例，并调用一个方法。这些实例不被重用，所以包装/填充很多文本字符串要构造自己的TextWrapper对象更有效。TextWrapper.break_long_words设置是否拆长单词。
textwrap.dedent(text)
反缩进去除每行行首的空白。这方便显示三引号中的内容而不修改其源代码中的缩进。