day4.md

第四天

索引

• Python标准库--textwrap
• Python好的文章--Python实现简单的遗传算法
• Python代码片段
• Python读书--Django企业开发实战day4
• Python项目相关--python 解析器
• Python之外--如何想静静

python标准库 textwrap

1. fill

import textwrap
sample_text = '''
    The textwrap module can be used to format text for output in
    situations where pretty-printing is desired.  It offers
    programmatic functionality similar to the paragraph wrapping
    or filling features found in many text editors.
    '''
print(textwrap.fill(sample_text, width=50))

2. dedent

dedented_text = textwrap.dedent(sample_text).strip()
for width in [45, 60]:
    print('{} Columns:\n'.format(width))
    print(textwrap.fill(dedented_text, width=width))
    print()
This produces outputs in th

3. indent

dedented_text = textwrap.dedent(sample_text)
wrapped = textwrap.fill(dedented_text, width=50)
wrapped += '\n\nSecond paragraph after a blank line.'
final = textwrap.indent(wrapped, '> ')

print('Quoted block:\n')
print(final)

4. shorten

import textwrap
from textwrap_example import sample_text

dedented_text = textwrap.dedent(sample_text)
original = textwrap.fill(dedented_text, width=50)

print('Original:\n')
print(original)

shortened = textwrap.shorten(original, 100)
shortened_wrapped = textwrap.fill(shortened, width=50)

print('\nShortened:\n')
print(shortened_wrapped)