473,839 Members | 1,368 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

re.findall

A question about the findall function in the re module, and I also
would be happy with pointers to online documentation with which I
could have found a solution myself (if it even exists!).

I have this program and result:

-------------- program ------------------
import re

pat = r'(.*) or (.*)'
r = re.findall(pat, "i or j or k")
print r
-------------- result -------------------
[('i or j', 'k')]
-------------------------------------------

But the result I want is this:
[('i', 'j or k'), ('i or j', 'k')]

So my regular expression is wrong, but also variations like
r'^(.*|.*?) or (.*|.*?)$' do not work. I have the feeling I am
overlooking something simple. Maybe I should not try to use
re.findall to get the desired result, but do a re.match in a
while-loop?

Stated in English the problem is this: give me all combinations of
strings left and right of r' or ', and return them as a list of
tuples. Sure I can solve this without using the re module, using
while-loops and string.search etc., but I also have variations of
this problem and learning re seems useful.
Jul 18 '05 #1
1 3305
hw***@hotmail.c om (Will Stuyvesant) wrote in
news:cb******** *************** ***@posting.goo gle.com:
A question about the findall function in the re module, and I also
would be happy with pointers to online documentation with which I
could have found a solution myself (if it even exists!).


The problem is that the strings you want to find are overlapping.
This should get you started:

import re

s = "i or j or k or grr"
pat = re.compile(r'\w + or \w+')

startposition = 0
while 1:
res = pat.search(s, startposition)
if res == None:
break
startposition = res.start() + 1
print res.group()
Matthias
Jul 18 '05 #2

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

Similar topics

3
31450
by: Michael Rockwell | last post by:
I am new to using C# generics and I am liking what I am finding. However the examples in online help are lacking. Can someone help me with the FindAll method of the generic List class? As I understand the method, it will return a list that meets the criteria evaluated in the delegate function that I use for evaluation. I am not sure how to write this delegate, how do I get the list item to evaluate in my delegate. Is their a defined...
5
24752
by: Dave | last post by:
Hi All C# ADSI samples that I run cause unspecified errors. If I translate them into VB.NET they run fine. Here's an example: public string getEmail(string LDAPPath, string username) { DirectoryEntry entry = new DirectoryEntry(LDAPPath);
5
8500
by: Mystilleef | last post by:
Hello, Is there a simple flag to set to allow overlapping matches for the findall() regular expression method? In other words, if a string contains five occurrences of the string pattern "cat", calling findall on the string returns a list containing five "cat" strings. Is it possible for findall() to just return one "cat" string? Thanks
1
1868
by: JerryB | last post by:
Hi, I have a string like this: invalidStr = "192.168.*.1" I want to be sure I don't get a * followed by a number, i.e. I want invalidStr to be invalid. So I do: numberAfterStar = re.compile(r'\*.*\d')
3
7496
by: DagoFlores | last post by:
Hi, let's take a look to this code that we already know.: List<stringdinosaurs = new List<string>(); dinosaurs.Add("Compsognathus"); dinosaurs.Add("Amargasaurus"); .... List<stringsublist = dinosaurs.FindAll(EndsWithSaurus); .... // Search predicate returns true if a string ends in "saurus".
5
3843
by: David Longnecker | last post by:
I'm working to create a base framework for our organization for web and client-side applications. The framework interfaces with several of our systems and provides the business and data layer connectivity for basic operations and such. I've ran into a snag that I just can't think myself out of. Here's an example: I have an object for a Student called StudentRecord. It has properties such as name, grade, identification number, etc.
7
7104
by: Abhishek | last post by:
Hi I am using a generic list in my program to have a list of objects stored. I want to compare all the objects in this list with object of another class and find all the objects which meet the criteria. To make it more specific I have a class Employee and a class Salary which look like Employee { Name
2
2263
by: =?Utf-8?B?bWdvbnphbGVzMw==?= | last post by:
I have a List<tobject consisting of objects which in themselves consist of BindingListViews of objects. When I want to search for a object value I normally create a foreach loop and increment a counter to provide me a count. How can I refactor the same function w/o the foreach and use findall instead? faux data structure: --------------------- -> | Customers
1
3444
by: Doug | last post by:
Hi, I have a collection of objects and I need to compare each item in the collection to see if it's a match on any or all of the others. I have stored my collection in an item like so: "List<PossibleDupsdups" where PossibleDups is an object of my own creation. I have been looking at how the ForEach and FindAll methods work and here is what I was thinking might be a good approach to doing this (in pseudocode):
2
6369
by: Alexnb | last post by:
Okay, I am not sure if there is a better way of doing this than findAll() but that is how I am doing it right now. I am making an app that screen scapes dictionary.com for definitions. However, I would like to have the type of the word for each definition. For example if def1 and def2 are noun defintions but def3 isn't: noun def1 def2
0
9856
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 usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
9698
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 synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
10589
jinu1996
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that captivates audiences and drives business growth. The Art of Business Website Design Your website is...
1
10654
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 most users, this new feature is actually very convenient. If you want to control the update process,...
1
7833
isladogs
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes instead of User Defined Types (UDT). For example, to manage the data in unbound forms. Adolph will...
0
5683
by: TSSRALBI | last post by:
Hello I'm a network technician in training and I need your help. I am currently learning how to create and manage the different types of VPNs and I have a question about LAN-to-LAN VPNs. The last exercise I practiced was to create a LAN-to-LAN VPN between two Pfsense firewalls, by using IPSEC protocols. I succeeded, with both firewalls in the same network. But I'm wondering if it's possible to do the same thing, with 2 Pfsense firewalls...
1
4494
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
2
4066
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.
3
3136
bsmnconsultancy
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating effective websites that not only look great but also perform exceptionally well. In this comprehensive...

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.