问题描述：

I have the following input text:

pagelimit=50&filtercolumn=Datacenter&filtervalue=abfg1&filtercolumn=MachineType&filtervalue=fg&filtercolumn=GPG&filtervalue=IPMI

I want to get back

1. filtercolumn=Datacenter&filtervalue=abfg1
2. filtercolumn=MachineType&filtervalue=fg
3. filtercolumn=GPG&filtervalue=IPMI

There may be an unlimited amount of these.

I have tried a few things. I\'m currently trying something like this:

(?:((filtercolumn=.*&filtervalue=.*)+)?)

But of course it doesn\'t work. I get:

1. filtercolumn=Datacenter&filtervalue=abfg1&filtercolumn=MachineType&filtervalue=fg&filtercolumn=GPG&filtervalue=IPMI
2. filtercolumn=Datacenter&filtervalue=abfg1&filtercolumn=MachineType&filtervalue=fg&filtercolumn=GPG&filtervalue=IPMI

网友观点：

python正则表达式精讲--分组

1. 什么是分组

分组是用圆括号“()”括起来的正则表达式，匹配出的内容就表示一个分组。使用分组，可以从目标字符串中提取出与圆括号内正则表达式相匹配的内容。