定制语法的string模板(template) 详解

本文地址: http://blog.csdn.net/caroline_wendy/article/details/28614491

string模板(template)参考: http://blog.csdn.net/caroline_wendy/article/details/27054263

string.Template()内添加替换的字符, 使用"$"符号, 或 在字符串内, 使用"${}"; 调用时使用string.substitute(dict)函数.

可以通过继承"string.Template", 覆盖变量delimiter(定界符)和idpattern(替换格式), 定制不同形式的模板.

代码:

# -*- coding: utf-8 -*-

‘‘‘
Created on 2014.6.5

@author: Administrator

@edition : python 3.3.0, eclipse pydev
‘‘‘



import string

template_text = ‘‘‘
    Delimiter : %%
    Replaced : %with_underscore
    Ingored : %notunderscored
‘‘‘

d = {‘with_underscore‘ : ‘replaced‘,
     ‘notunderscored‘ : ‘not replaced‘}

class MyTemplate(string.Template):
    delimiter = ‘%‘
    idpattern = ‘[a-z]+_[a-z]+‘
    
t = MyTemplate(template_text)
print(‘Modified ID pattern: ‘)
print(t.safe_substitute(d))

Modified ID pattern: 

    Delimiter : %
    Replaced : replaced
    Ingored : %notunderscored