python - Random Sample with remove from List -


good evening!still new programming bare me. simple question hope!

i have data in list like:

l = [(3,4,5),(1,4,5),(1,2,3),(1,2,3)]

i need sample randomly size of 2 wanted used:

import random t1 = random.sample(set(l),2)

now t1 list of randomly pulled values, wanted remove randomly pulled our initial list our initial list. linear loop task i'm trying larger list. run time take ever!

any suggestions on how go this?

t1 = [l.pop(random.randrange(len(l))) _ in xrange(2)]

doesn't change order of remaining elements in l.


Comments

Post a Comment

Popular posts from this blog

java - Cast from Object to List<String>: CastClassException -

i'm using touchdb ektorp in android app access couchdb the json document i'm accessing has array of categories: categories: ['cat1', 'cat2'] in view query i'm trying access array classcastexception when trying convert result object list: public void map(map<string, object> document, tdviewmapemitblock emitter) { object dateadded = document.get("dateadded"); object expirydate = document.get("expirydate"); boolean expired = false; if(expirydate!=null){ expired = comparedate.isitemexpired(expirydate); } list<string> test = (list<string>)document.get("categories"); the .get() method works fine single json fields. ideas? document declared map<string, object> so when .get() - return object. there's no direct mapping (list<string>) exception saying need cast object rather list. you ch...
Read more

How to set a border for android Imageview in Longpress? -

in android application want set border imageview when long pressed. want remove same(border) when user releases view. please anyone, me in this? @override public boolean ontouchevent(motionevent event) { switch (event.getaction()) { case motionevent.action_down: { mtouchdownx = (int) event.getx(); mtouchdowny = (int) event.gety(); break; } case motionevent.action_move: { int x = (int) event.getx(); int y = (int) event.gety(); if (mdraggeditem >= 0) { setdraggeditemposition(x, y); int index = getindexfromcoordinates(x, y); if (index == mdraggeditem || index < 0) break; if (index < mdraggeditem) { (int = index; < mdraggeditem; i++) { moveviewtoposition(i, i+1); } (int = mdraggeditem-1; >= index; i--) { ...
Read more

c# - Operator '==' incompatible with operand types 'Guid' and 'Guid' using DynamicExpression.ParseLambda<T, bool> -

i'm using dynamic linq library , there source code , basic docu , nuget version pm> install-package dynamiclinq i'm trying construct clause involves guids i have tried string "id == @0" . parameter array object[] value ( guid xxxx ) var whereclausesb = buildlogicalkeywhereclause2(entity, logicalkey); //build string var parms = buildparamarray(entity, logicalkey); // object[] var wherelambda = ofsi.bos.core.dynamicexpression.parselambda<t, bool>(whereclausesb.tostring(),parms); //parse an exception thrown in dynamicexpression.parselambda operator '==' incompatible operand types 'guid' , 'guid' i have tried guid , string.(fail) i tried , "id = @0" (fail). string == string works, int32==int32 not guid == guid not any ideas? try using equals method instead of == operator in string: "id.equals(@0)"
Read more