473,387 Members | 1,501 Online
Bytes | Software Development & Data Engineering Community
Post Job

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 473,387 software developers and data experts.

Re: value is in list?

Hello ,
following scenario

list_current = [ "welcome", "search", "done", "result"]
list_ldap = [ "welcome", "hello"]

result:

list_toadd = [ "hello"]

by words said , i want to check if list item from list_ldap exists in
list_current if not i want to add it to list_toadd.

Thanks!

D.
list_toadd = [i for i in list_ldap if i not in list_current]
seems to work.

I'm sure there's a way to do it with set objects as well.
-Steven
Jun 27 '08 #1
1 1287
On Jun 12, 11:46 pm, "Steven Clark" <steven.p.cl...@gmail.comwrote:
Hello ,
following scenario
list_current = [ "welcome", "search", "done", "result"]
list_ldap = [ "welcome", "hello"]
result:
list_toadd = [ "hello"]
by words said , i want to check if list item from list_ldap exists in
list_current if not i want to add it to list_toadd.
Thanks!
D.

list_toadd = [i for i in list_ldap if i not in list_current]
seems to work.

I'm sure there's a way to do it with set objects as well.
-Steven
>>list_current = [ "welcome", "search", "done", "result"]
list_ldap = [ "welcome", "hello"]
to_add = set(list_ldap) - set(list_current)
to_add
set(['hello'])

- Paddy.
Jun 27 '08 #2

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

Similar topics

14
by: ago | last post by:
Is it possible to have a default value associated python objects? I.e. to flag an attribute in such a way that the assignment operator for the object returns the default attribute instead of the...
6
by: Dave Hopper | last post by:
Hi I am using the following SQL to retrieve a value in a list box using a unique ID held in the list box call cntID. The list box is used on an order form to list appointments that have been...
4
by: Martyn Fewtrell | last post by:
I want to update a database record with a number of fields - doesn't sound to difficult at this stage! I have a system to select the correct record from the database and load the data into a...
2
by: Martin Ortiz | last post by:
Ugh.... All classes are copy by reference, even if you use "ByVal" and NOT "ByRef" it's still a copy by reference. Of course, as a consequence, if you change any values of the object you passed...
2
by: Mike Collins | last post by:
I cannot get the correct drop down list value from a drop down I have on my web form. I get the initial value that was loaded in the list. It was asked by someone else what the autopostback was...
3
by: imrantbd | last post by:
This is my first problem.Please help me. I have the following code: <head> <script language="JavaScript"> function addSrcToDestList() { destList1 = window.document.forms.destList; srcList...
9
by: Johnny Jörgensen | last post by:
Hi y'all I've got a custom control that is inherited from a normal TextBox. To that, I've added a new property that I call "Units", Which is a collection class containing members of a "Unit"...
0
by: Amar | last post by:
Hi, I have a generic list with a some objects of a particular class in it. I have implemented a IComparer for the the class and pass it to the List. The list.sort method works fine when the value...
45
by: Zytan | last post by:
This returns the following error: "Cannot modify the return value of 'System.Collections.Generic.List<MyStruct>.this' because it is not a variable" and I have no idea why! Do lists return copies...
0
by: zman77 | last post by:
EDIT: -- forgot to mention... I am using Visual Studio 2005, on Win XP, on an intel machine Hi. This is my first post, though I've "lurked" for a while because I find these forums very helpful....
0
by: aa123db | last post by:
Variable and constants Use var or let for variables and const fror constants. Var foo ='bar'; Let foo ='bar';const baz ='bar'; Functions function $name$ ($parameters$) { } ...
0
by: ryjfgjl | last post by:
If we have dozens or hundreds of excel to import into the database, if we use the excel import function provided by database editors such as navicat, it will be extremely tedious and time-consuming...
0
by: ryjfgjl | last post by:
In our work, we often receive Excel tables with data in the same format. If we want to analyze these data, it can be difficult to analyze them because the data is spread across multiple Excel files...
0
BarryA
by: BarryA | last post by:
What are the essential steps and strategies outlined in the Data Structures and Algorithms (DSA) roadmap for aspiring data scientists? How can individuals effectively utilize this roadmap to progress...
1
by: nemocccc | last post by:
hello, everyone, I want to develop a software for my android phone for daily needs, any suggestions?
1
by: Sonnysonu | last post by:
This is the data of csv file 1 2 3 1 2 3 1 2 3 1 2 3 2 3 2 3 3 the lengths should be different i have to store the data by column-wise with in the specific length. suppose the i have to...
0
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,...
0
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...
0
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...

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.