发布于 2016-01-13 07:26:18 | 211 次阅读 | 评论: 0 | 来源: 网友投递
Python编程语言
Python 是一种面向对象、解释型计算机程序设计语言，由Guido van Rossum于1989年底发明，第一个公开发行版发行于1991年。Python语法简洁而清晰，具有丰富和强大的类库。它常被昵称为胶水语言，它能够把用其他语言制作的各种模块（尤其是C/C++）很轻松地联结在一起。
这篇文章主要介绍了python编程开发之textwrap文本样式处理技巧,实例分析了Python中textwrap的常用方法与处理文本样式的相关使用技巧,需要的朋友可以参考下
本文实例讲述了python编程开发之textwrap文本样式处理技巧。分享给大家供大家参考，具体如下：
在看python的API的时候，发现python的textwrap在处理字符串样式的时候功能强大
在这里我做了一个demo：
textwrap提供了一些方法：
wrap(text, width = 70, **kwargs):这个函数可以把一个字符串拆分成一个序列
from textwrap import * #使用textwrap中的wrap()方法 def test_wrap(): test_str = '''\ The textwrap module provides two convenience functions, wrap() and fill(), as well as 1 TextWrapper, the class that does all the work, and two utility functions, dedent() and indent(). If 2 you're just wrapping or filling one or two text strings, the convenience functions should be good 3 enough; otherwise, you should use an instance of TextWrapper for efficiency. 4 ''' print(wrap(test_str, 20)) def main(): test_wrap() if __name__ == '__main__': main()
输出效果：
Python 3.3.2 (v3.3.2:d047928ae3f6, May 16 2013, 00:03:43) [MSC v.1600 32 bit (Intel)] on win32 Type "copyright", "credits" or "license()" for more information. >>> ================================ RESTART ================================ >>> [' The textwrap', 'module provides two', 'convenience', 'functions, wrap()', 'and fill(), as well', 'as 1', 'TextWrapper, the', 'class that does all', 'the work, and two', 'utility functions,', 'dedent() and', 'indent(). If 2', 'you're just wrapping', 'or filling one or', 'two text strings,', 'the convenience', 'functions should be', 'good 3 enough;', 'otherwise, you', 'should use an', 'instance of', 'TextWrapper for', 'efficiency. 4'] >>>
我们会发现，wrap()函数，把字符串拆分成了一个序列，在这个序列中，每个元素的长度是一样的。
fill(text, width=70, **kwargs) :该方法可以根据指定的长度，进行拆分字符串，然后逐行显示
from textwrap import * #fill()方法 def test_wrap(): test_str = '''\ The textwrap module provides two convenience functions, wrap() and fill(), as well as 1 TextWrapper, the class that does all the work, and two utility functions, dedent() and indent(). If 2 you're just wrapping or filling one or two text strings, the convenience functions should be good 3 enough; otherwise, you should use an instance of TextWrapper for efficiency. 4 ''' print(fill(test_str, 40)) def main(): test_wrap() if __name__ == '__main__': main()
运行效果：
Python 3.3.2 (v3.3.2:d047928ae3f6, May 16 2013, 00:03:43) [MSC v.1600 32 bit (Intel)] on win32 Type "copyright", "credits" or "license()" for more information. >>> ================================ RESTART ================================ >>> The textwrap module provides two convenience functions, wrap() and fill(), as well as 1 TextWrapper, the class that does all the work, and two utility functions, dedent() and indent(). If 2 you're just wrapping or filling one or two text strings, the convenience functions should be good 3 enough; otherwise, you should use an instance of TextWrapper for efficiency. >>>
dedent()方法->文本进行不缩进显示，相应的indent()方法 -> 进行缩进显示
from textwrap import *
#dedent()方法
def test_wrap():
test_str = '''\
The textwrap module provides two convenience
functions, wrap() and fill(), as well as 1
TextWrapper, the class that does all the work,
and two utility functions, dedent() and indent(). If 2
you're just wrapping or filling one or two text strings,
the convenience functions should be good 3
enough; otherwise, you should use an instance
of TextWrapper for efficiency. 4
'''
print(repr(dedent(test_str)))
def main():
test_wrap()
if __name__ == '__main__':
main()
运行效果：
Python 3.3.2 (v3.3.2:d047928ae3f6, May 16 2013, 00:03:43) [MSC v.1600 32 bit (Intel)] on win32 Type "copyright", "credits" or "license()" for more information. >>> ================================ RESTART ================================ >>> 'The textwrap module provides two convenience\n functions, wrap() and fill(), as well as 1\nTextWrapper, the class that does all the work,\n and two utility functions, dedent() and indent(). If 2\nyou're just wrapping or filling one or two text strings,\n the convenience functions should be good 3\nenough; otherwise, you should use an instance\n of TextWrapper for efficiency. 4\n' >>>
希望本文所述对大家Python程序设计有所帮助。