re.match（）。groups（）如何工作？

Question

I am trying to strip a selection of information from a string using re.match().groups():

s = "javascript:Add2ShopCart(document.OrderItemAddForm,%20'85575',%20'Mortein%20Mouse%20Trap%201%20pack',%20'',%20'$4.87');"

The result I want is:

("Mortein%20Mouse%20Trap%201%20pack", "4.87")

So I have been trying:

re.match(r"(SEPARATOR)(SEPARATOR)", s).groups() #i.e.:
re.match(r"(\',%20\')(\$)", s).groups()

I have tried looking at the re documentation , but as my regexing skills are so sub-par it's not helping me much.

More sample input:

javascript:Add2ShopCart(document.OrderItemAddForm,%20'85575',%20'Mortein%20Mouse%20Trap%201%20pack',%20'',%20'$4.87');

javascript:Add2ShopCart(document.OrderItemAddForm_0,%20'85575',%20'Mortein%20Mouse%20Trap%201%20pack',%20'',%20'$4.87');

javascript:Add2ShopCart(document.OrderItemAddForm,%20'8234551',%20'Mortein%20Naturgard%20Fly%20Spray%20Eucalyptus%20320g',%20'',%20'$7.58');

javascript:Add2ShopCart(document.OrderItemAddForm,%20'4204369',%20'Mortein%20Naturgard%20Insect%20Killer%20Automatic%20Outdoor%20Refill%20152g',%20'',%20'$15.18');

javascript:Add2ShopCart(document.OrderItemAddForm_0,%20'4204369',%20'Mortein%20Naturgard%20Insect%20Killer%20Automatic%20Outdoor%20Refill%20152g',%20'',%20'$15.18');

javascript:Add2ShopCart(document.OrderItemAddForm,%20'4220523',%20'Mortein%20Naturgard%20Outdoor%20Automatic%20Prime%201%20pack',%20'',%20'$32.54');

Answer 1

re.findall(r"""
   '          #apostrophe before the string Mortein
   (          #start capture
   Mortein.*? #the string Moretein plus everything until...
   )          #end capture
   '          #...another apostrophe
   .*         #zero or more characters
   \$         #the literal dollar sign
   (          #start capture
   .*?        #zero or more characters until...
   )          #end capture
   '          #an apostrophe""", s, re.X)

This will return an array with the Mortein and $ amounts as a tuple. You can also use:

re.search(r"'(Mortein.*?)'.*\$(.*?)'", s)

This returns a match. .group(1) is Moretein and .group(2) is $ . .group(0) is the entire string that was matched.

Answer 2

You can use

javascript:Add2ShopCart.*?,.*?,%20'(.*?)'.*?\$(\d+(?:\.\d+)?)

Group 1,2 captures what you want.

Answer 3

not a regex one shot, hope it helps:

In [16]: s="""s = javascript:Add2ShopCart(document.OrderItemAddForm,%20'85575',%20'Mortein%20Mouse%20Trap%201%20pack',%20'',%20'$4.87');"""

In [17]: arr=s.split("',%20'")

In [18]: arr[1]
Out[18]: 'Mortein%20Mouse%20Trap%201%20pack'

In [19]: re.findall("(?<=\$)[^']*",arr[3])
Out[19]: ['4.87']