473,555 Members | 2,307 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

Regular expressions and sub

Hey hey --

I've got a question about regular expression substitions. Basically,
I want to do something like this:

re.sub(r"(stuff )|(blah)", r"I was \00", "stuff blah")

Which would yield the string "I was stuff I was blah" -- but I get "I
was \x00 I was \x00" because apparently the replace string is simply
being interpreted as a normal string, and not a regular expression.

So, my question is, is there a simple way to do what I want?

Thanks much,
John
Jul 18 '05 #1
1 1358
On Thu, 2004-03-25 at 21:44, Emhoff wrote:
Hey hey --

I've got a question about regular expression substitions. Basically,
I want to do something like this:

re.sub(r"(stuff )|(blah)", r"I was \00", "stuff blah")

Which would yield the string "I was stuff I was blah" -- but I get "I
was \x00 I was \x00" because apparently the replace string is simply
being interpreted as a normal string, and not a regular expression.

So, my question is, is there a simple way to do what I want?

Thanks much,
John


Here's one way:
re.sub(r"(stuff |blah)", r"I was \1", "stuff blah")

'I was stuff I was blah'

Rich
Jul 18 '05 #2

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

8
2419
by: Michael McGarry | last post by:
Hi, I am horrible with Regular Expressions, can anyone recommend a book on it? Also I am trying to parse the following string to extract the number after load average. ".... load average: 0.04, 0.02, 0.01" how can I extract this number with RE or otherwise?
1
4157
by: Kenneth McDonald | last post by:
I'm working on the 0.8 release of my 'rex' module, and would appreciate feedback, suggestions, and criticism as I work towards finalizing the API and feature sets. rex is a module intended to make regular expressions easier to create and use (and in my experience as a regular expression user, it makes them MUCH easier to create and use.) ...
2
5012
by: Sehboo | last post by:
Hi, I have several regular expressions that I need to run against documents. Is it possible to combine several expressions in one expression in Regex object. So that it is faster, or will I have to use all the expressions seperately? Here are my regular expressions that check for valid email address and link Dim Expression As String =
4
5148
by: Együd Csaba | last post by:
Hi All, I'd like to "compress" the following two filter expressions into one - assuming that it makes sense regarding query execution performance. .... where (adate LIKE "2004.01.10 __:30" or adate LIKE "2004.01.10 __:15") .... into something like this: .... where adate LIKE "2004.01.10 __:(30/15)" ...
7
3802
by: Billa | last post by:
Hi, I am replaceing a big string using different regular expressions (see some example at the end of the message). The problem is whenever I apply a "replace" it makes a new copy of string and I want to avoid that. My question here is if there is a way to pass either a memory stream or array of "find", "replace" expressions or any other way...
3
3010
by: a | last post by:
I'm a newbie needing to use some Regular Expressions in PHP. Can I safely use the results of my tests using 'The Regex Coach' (http://www.weitz.de/regex-coach/index.html) Are the Regular Expressions used in Perl identical to the Regular Expressions in PHP?
25
5137
by: Mike | last post by:
I have a regular expression (^(.+)(?=\s*).*\1 ) that results in matches. I would like to get what the actual regular expression is. In other words, when I apply ^(.+)(?=\s*).*\1 to " HEART (CONDUCTION DEFECT) 37.33/2 HEART (CONDUCTION DEFECT) WITH CATHETER 37.34/2 " the expression is "HEART (CONDUCTION DEFECT)". How do I gain access...
1
4364
by: Allan Ebdrup | last post by:
I have a dynamic list of regular expressions, the expressions don't change very often but they can change. And I have a single string that I want to match the regular expressions against and find the first regular expression that matches the string. I've gor the regular expressions ordered so that the highest priority is first (if two or more...
13
7465
by: Wiseman | last post by:
I'm kind of disappointed with the re regular expressions module. In particular, the lack of support for recursion ( (?R) or (?n) ) is a major drawback to me. There are so many great things that can be accomplished with regular expressions this way, such as validating a mathematical expression or parsing a language with nested parens, quoting...
12
2447
by: FAQEditor | last post by:
Anybody have any URL's to tutorials and/or references for Regular Expressions? The four I have so far are: http://docs.sun.com/source/816-6408-10/regexp.htm http://en.wikipedia.org/wiki/Regular_expression http://www.regular-expressions.info/javascript.html http://www.webreference.com/js/column5/
0
7622
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main...
0
7547
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language...
0
7825
Oralloy
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. ...
1
7588
by: Hystou | last post by:
Overview: Windows 11 and 10 have less user interface control over operating system update behaviour than previous versions of Windows. In Windows 11 and 10, there is no way to turn off the Windows Update option using the Control Panel or Settings app; it automatically checks for updates and installs any it finds, whether you like it or not. For...
0
7904
tracyyun
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the...
0
6176
agi2029
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then...
0
5171
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert...
1
2037
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
1
1159
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.