CODEWITHSUNDEEP
pythonxmlregex
user2671656
user2671656

Reputation: 173

Parsing XML in Python with regex

I'm trying to use regex to parse an XML file (in my case this seems the simplest way).

For example a line might be:

line='<City_State>PLAINSBORO, NJ 08536-1906</City_State>'

To access the text for the tag City_State, I'm using:

attr = re.match('>.*<', line)

but nothing is being returned.

Can someone point out what I'm doing wrong?

Upvotes: 16

Views: 34841

Answers (3)

Viktor Kerkez
Viktor Kerkez

Reputation: 46586

Please, just use an XML parser like ElementTree

>>> from xml.etree import ElementTree as ET
>>> line='<City_State>PLAINSBORO, NJ 08536-1906</City_State>'
>>> ET.fromstring(line).text
'PLAINSBORO, NJ 08536-1906'

Upvotes: 9

Kyle
Kyle

Reputation: 178

re.match returns a match only if the pattern matches the entire string. To find substrings matching the pattern, use re.search.

And yes, this is a simple way to parse XML, but I would highly encourage you to use a library specifically designed for the task.

Upvotes: 0

TerryA
TerryA

Reputation: 59974

You normally don't want to use re.match. Quoting from the docs:

If you want to locate a match anywhere in string, use search() instead (see also search() vs. match()).

Note:

>>> print re.match('>.*<', line)
None
>>> print re.search('>.*<', line)
<_sre.SRE_Match object at 0x10f666238>
>>> print re.search('>.*<', line).group(0)
>PLAINSBORO, NJ 08536-1906<

Also, why parse XML with regex when you can use something like BeautifulSoup :).

>>> from bs4 import BeautifulSoup as BS
>>> line='<City_State>PLAINSBORO, NJ 08536-1906</City_State>'
>>> soup = BS(line)
>>> print soup.find('city_state').text
PLAINSBORO, NJ 08536-1906

Upvotes: 23

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