Possible Duplicate:
Reversing a regular expression in python可能的重复:在python中反转正则表达式
I think I ran into a problem that sounds easier than it is... I'm not too sure. I want to define a regular expression, and I want to build a number of strings matching it.
我觉得我遇到了一个听起来比实际容易的问题……我不太确定。我想定义一个正则表达式，我想构建一些匹配它的字符串。
Is there any module I can import that has got this functionality? Preferably not a brute-force approach using re.search or re.match. There must be a more elegant way to do that.
我可以导入任何具有此功能的模块吗?最好不是使用re.search或re.match的蛮力方法。必须有一种更优雅的方式来做到这一点。
3 个解决方案
#1
19
I've been working on a little helper library for generating random strings with Python
我一直在开发一个小助手库，用于用Python生成随机字符串
It includes a method, xeger() that allows you to create a string from a regex:
它包括一个方法，xeger()，它允许您从regex创建一个字符串:
>>> import rstr
>>> rstr.xeger(r'[A-Z]\d[A-Z] \d[A-Z]\d')
u'M5R 2W4'
Right now, it works with most basic regular expressions.
现在，它适用于大多数基本的正则表达式。
#2
7
The exrex module does this: https://github.com/asciimoo/exrex.
exrex模块执行以下操作:https://github.com/asciimoo/exrex。
#3
1
For some regular expressions, the list of possible strings can be infinite. For example:
对于某些正则表达式，可能的字符串列表可以是无限的。例如:
a*
includes
包括
a
aa
aaa
etc. Thus, there is no way to generate all strings for a given regex.
因此，无法为给定的regex生成所有字符串。
#1
19
I've been working on a little helper library for generating random strings with Python
我一直在开发一个小助手库，用于用Python生成随机字符串
It includes a method, xeger() that allows you to create a string from a regex:
它包括一个方法，xeger()，它允许您从regex创建一个字符串:
>>> import rstr
>>> rstr.xeger(r'[A-Z]\d[A-Z] \d[A-Z]\d')
u'M5R 2W4'
Right now, it works with most basic regular expressions.
现在，它适用于大多数基本的正则表达式。
#2
7
The exrex module does this: https://github.com/asciimoo/exrex.
exrex模块执行以下操作:https://github.com/asciimoo/exrex。
#3
1
For some regular expressions, the list of possible strings can be infinite. For example:
对于某些正则表达式，可能的字符串列表可以是无限的。例如:
a*
includes
包括
a
aa
aaa
etc. Thus, there is no way to generate all strings for a given regex.
因此，无法为给定的regex生成所有字符串。