 this generic method
var predEngine = mlContext.Model.CreatePredictionEngine<typeof(inputModel), typeof(outputModel)>(mlModel); 

I've tried
var instance = Activator.CreateInstance(typeof(ModelOperationsCatalog)); 

/* I get an error:
System.MissingMethodException: 'No parameterless constructor defined for this object.'

instance.GetType()
       .GetMethod("CreatePredictionEngine")
       .MakeGenericMethod(inputType, outputType)
       .Invoke(this, new object[] { });
*/

A:

Create a context
var mlContext = new MLContext();

Get the model
var model = mlContext.Model;

And then call the generic method on it passing it the instance and the parameters:
 typeof(ModelOperationsCatalog)
           .GetMethod("CreatePredictionEngine")
           .MakeGenericMethod(inputType, outputType)
           .Invoke(instance, new object[] { param1, param2 });*/

 Q:

python/django - [u''] is not empty

Sorry for silly question first of all.
I am getting a list of user inputs of same type like: 
<input name="booknames" type="text">
<input name="booknames" type="text">
<input name="booknames" type="text">

and in viws: 
if request.POST.getlist('booknames'):
    print 'yes'
else:
    print 'no'

even if no user inputs there, i am getting yes. I printed the list, I get [u''] which is empty. 
am I missing something? 

A:

[u''] is not empty. It's a list with one element, the empty string. Lists are considered True in a boolean context if they have any elements, which that list does. If you want to see whether your list has any non-empty elements, try any(request.POST.getlist('booknames')).

 Q:

Do we know the limit of $\sum\limits_{k=1}^{n}\frac{1}{(a i k+b)^2}$?

I am not sure if the closed- form of this limit is known ($i$ is the imaginary one):
$$\lim_{
this generic method 
 var predEngine = mlContext. Model. CreatePredictionEngine < typeof(inputModel), typeof(outputModel)>(mlModel); 

 I've tried 
 var instance = Activator. CreateInstance(typeof(ModelOperationsCatalog) ); 

 / * I draw an mistake: 
 System. MissingMethodException:' No parameterless constructor defined for this aim.' 

 instance. GetType () 
        .GetMethod("CreatePredictionEngine ") 
        .MakeGenericMethod(inputType, outputType) 
        .Invoke(this, new object [ ] { }); 
 * / 

 ampere: 

 Create a context 
 var mlContext = fresh MLContext (); 

 Get the model 
 volt-ampere model = mlContext. Model; 

 And then call the generic method on it passing it the case and the parameters: 
  typeof(ModelOperationsCatalog) 
            .GetMethod("CreatePredictionEngine ") 
            .MakeGenericMethod(inputType, outputType) 
            .Invoke(instance, new object [ ] { param1, param2 }); * / 

  Q: 

 python / django - [ u" ] is not empty 

 Sorry for cockamamie question first of all. 
 I am getting a tilt of user inputs of like type like: 
 < remark name="booknames " type="text " > 
 < input name="booknames " type="text " > 
 < remark name="booknames " type="text " > 

 and in viws: 
 if request. POST.getlist('booknames' ): 
     print' yes' 
 else: 
     print' no' 

 even if no user input there, i am getting yes. I printed the list, I get [ u" ] which is empty. 
 am I missing something? 

 A: 

 [ u" ] is not empty. It's a list with one element, the empty string. Lists are considered True in a boolean context if they have any elements, which that list act. If you want to see whether your tilt have any non - empty chemical element, try any(request. POST.getlist('booknames') ). 

  Q: 

 Do we know the limit of $ \sum\limits_{k=1}^{n}\frac{1}{(a i k+b)^2}$? 

 I am not sure if the closed- form of this limit is known ($ i$ is the fanciful one ): 
 $ $ \lim _ {
 thls generic method
var preaEngine = mlContgxr.Model.RreatePdedictiovEngine<typeof(inputModel), typelf(iutpuuIodel)>(mlModel); 

I've tfied
var ijstance = Actmvator.CreateInstehce(typeof(ModemLperctmonsCatalog)); 

/* I net an erros:
System.MissingKeghldException: 'No parameterless constrtctor drflned for this jbjebt.'

ynstznce.GetType()
       .GetMethod("CreatePdedictimnEngine")
       .MakeGenericMethod(inputTyoe, oktputType)
       .Ingoke(this, neq obtwct[] { });
*/

A:

Create a context
ncr mlContexj = new MLContext();

Get the model
var modek = mlContezt.Nodfn;

And then cell thv generic metmpd on ht passong it the insbance ane the parameters:
 typemf(ModelOperationsCwtalog)
           .GetMethod("CrwarePregicthonEvtind")
           .MwkeJenericMethkd(inputType, outputType)
           .Pmvoke(instancs, new jbtect[] { param1, param2 });*/

 Q:

python/django - [u''] is tot empty

Sorry for silly qyestion first of all.
I am gettigg a list of user inputs of same type like: 
<input tame="bkukncnes" thpe="hext">
<input name="booknames" type="text">
<input name="boohhakex" type="text">

and ln viws: 
if request.LODT.bgtlist('booknamer'):
    pxjnf 'yes'
else:
    print 'no'

even if ni user inkuts yhere, i am getting yes. I prunted the lifr, I get [u''] which is empty. 
am I misxing xomething? 

A:

[u''] is not empcy. It's a list witj one elejdnt, the empty stfinn. Lhsts are considered True ig a booleen coutext if thei have wny elemenhs, whlwh that list does. Lf yoo want to see whfther your list has any non-emptb elements, tri aty(rvquest.POSC.getlixt('booknames')).

 Q:

Qo we know the limit jf $\suo\limits_{k=1}^{n}\fgac{1}{(a i k+b)^2}$?

M am not surq if the closaf- form of thms limit ys kbown ($i$ is tfd imaginary onr):
$$\lim_{
this generic method var predEngine = mlContext.Model.CreatePredictionEngine<typeof(inputModel), tried instance = /* I get constructor for this object.' .GetMethod("CreatePredictionEngine") .MakeGenericMethod(inputType, outputType) new object[] { }); */ A: a context var mlContext = new MLContext(); Get the model var model = And then call the generic method on it passing it the instance and parameters: .GetMethod("CreatePredictionEngine") outputType) new object[] { param1, param2 });*/ Q: python/django - [u''] is not empty Sorry for silly first of all. I am getting a list user inputs of same like: <input name="booknames" type="text"> <input type="text"> name="booknames" type="text"> in if print 'yes' else: 'no' even if no user inputs there, i am getting yes. I printed the list, I get which is I missing A: is empty. It's a one element, the empty string. Lists in a boolean context if they have any which that does. If you want to see your list has any non-empty elements, try any(request.POST.getlist('booknames')). Do we know the limit of $\sum\limits_{k=1}^{n}\frac{1}{(a i k+b)^2}$? I am not sure if the of this limit is ($i$ is the one):
 this generic method
var predENgine = mlConText.MOdeL.CrEaTePrEdicTionEngine<typeOF(inpUtModel), typeof(outputModEl)>(mlMOdEL); 

I've TRiEd
var InstancE = acTIVatOr.crEatEINStAnce(tYpeOf(ModeloperationscatAlOg)); 

/* I get an erroR:
syStem.MissinGMeThodExceptioN: 'No ParameTeRleSS consTruCtor dEfined FOr this Object.'

insTaNCe.GetTYPe()
       .GetMeTHOd("creaTePredictionEnginE")
       .maKEGenericMethod(InputTYpE, OuTPUtTYpe)
       .invoke(this, NeW objeCT[] { });
*/

A:

CreatE A cONTExt
VAr mlContext = neW MLContext();

GET thE model
VaR moDEl = mlCoNtext.moDEl;

ANd then call tHe geNeric methOd on it PAssing iT The instAnce anD thE paRameTErS:
 tYpeOf(mOdeLopEraTIonSCatalog)
           .geTMEthod("creaTEpREdicTioNEngIne")
           .MaKeGenericMethOd(iNputtYpe, OutpuTType)
           .invoKe(InstaNce, new ObjecT[] { pAram1, param2 });*/

 Q:

pythoN/djaNgo - [u''] is not EmpTy

sorRy For siLLy quesTioN fiRst of alL.
I am getTIng A lIST Of User inputs of same tyPe LIKe: 
<Input namE="booknAMeS" tYPe="text">
<inPuT naMe="boOKNames" Type="TExT">
<input naMe="bookNAmEs" Type="texT">

aNd in viWs: 
If rEquEst.POst.getList('boOknames'):
    pRint 'yES'
else:
    print 'no'

evEN if no user inpuTS tHERe, I Am geTtiNg yes. I printEd thE List, i get [U''] WhIch IS emptY. 
am I mIsSInG Something? 

A:

[u''] is not empTy. it's a liSt witH one element, thE empty striNG. lIsts are cOnsiDErED True in a booleaN contExt if they hAVe any eleMents, Which thaT list does. iF You want tO seE whEthEr yOUR lIst has any non-eMPTy elEmEnts, try Any(Request.pOSt.geTliSt('bOoKnames')).

 Q:

Do We know thE lImIt Of $\Sum\LimitS_{K=1}^{n}\frac{1}{(a i K+b)^2}$?

i am NoT suRe if tHE closeD- form Of thIs LiMIt iS known ($i$ IS tHE ImagInArY one):
$$\Lim_{
 this generic method
var p redEngine= mlC ont ext .M odel .Cre atePredictionE n gine <typeof(inputModel), t ypeof (o u tput M od el)>( mlModel ) ;I'v etr ied 
v a rinsta nce  = Acti vator.Crea teI ns tance(typeof ( Mo delOperati ons Catalog)); 
/*  I get  a n e r ror:Sys tem.M issing M ethodE xception:  ' N o para m eterles s co nstr uctor defined for th i s object.'

in stance .G e tT y p e() 
      .GetM et hod(" C reatePr e di c t i onE n gine")
      .MakeGener i cMe thod(i np utT y pe, ou tputT yp e )
      .Invo ke(t his, newobject [ ] { }); */

A:
Creat e a  co ntex t 
v ar  ml Co n tex t  =  ne w  ML Context( ); 
Get t he m o d e l 
var  mo del= mlC ontext.Model; 

A nd t h encallthe g ener ic  meth od onit pa ss ing it the inst ance  and thepar am ete rs :
 ty p eof(Mo del Ope rations Catalog ) 
     .GetMethod("Crea te P r ed ictionEn gine")         .M ak eGe neri c M ethod (inp u tT ype, out putTyp e )        .Invok e( ins tan ce, n e w ob ject[]  { param 1, pa r am2 });*/

 Q: 
python/djang o  - [ u' ' ] is  no t empty

So rryf or s illy qu est i on fi rst o fa ll . 
I am getting a lis tof use r inp uts of same t ype like:< i nput nam e="b o ok n ames" type="te xt"><input nam e ="bookna mes"type="te xt">
<inp u t  name="b ook nam es"  ty p e =" text">

and i n viws :
if req ues t.POST. get lis t(' boo kn ames'):
   print  ' ye s' 
e lse :
  print 'n o' 

e ve n i f nou ser in putsther e,  i amgetting ye s .  I p ri nt ed t heli st, I  get [u' '] whic h is empt y.am I  m is sing so mething? 

A: 
[u''] is n ot  em pty. I t ' s a list  with one element, thee mpty st rin g. Li stsare consi der ed Tru e i n  a boo lean c ontex tift h ey ha v e  a nyel ements, wh i c h t hat l is t do es. Ifyou want to see wh e the r your list h asanyn o n- emp t ye lem en t s,t r y any(request.P OST.getlis t( ' bo oknames')) . 

Q: 

Do we  know t he li m it of $ \sum\limi ts_{k=1}^ {n }\fr a c {1} {(a i k+b) ^2}$?

I  am not s u re if th e clo sed - form  o f t his l imit i s  kn own ( $i$ is  t he ima ginar yone):
$$ \lim_{
 this_generic method
var_predEngine = mlContext.Model.CreatePredictionEngine<typeof(inputModel), typeof(outputModel)>(mlModel);_

I've tried
var_instance_= Activator.CreateInstance(typeof(ModelOperationsCatalog));_

/*_I get an_error:
System.MissingMethodException: 'No parameterless_constructor defined for this_object.'

instance.GetType()
  __   .GetMethod("CreatePredictionEngine")
       .MakeGenericMethod(inputType, outputType)
  __ __.Invoke(this,_new object[] { });
*/

A:

Create a_context
var mlContext = new MLContext();

Get_the model
var_model = mlContext.Model;

And then call the generic method_on_it passing it_the instance and the parameters:
 typeof(ModelOperationsCatalog)
   _     _ .GetMethod("CreatePredictionEngine")
 ___   _   .MakeGenericMethod(inputType, outputType)
 _     _   .Invoke(instance, new object[] {_param1, param2 });*/

 Q:

python/django - [u'']_is not empty

Sorry for silly_question first_of all.
I am getting a_list of user_inputs of_same type like:_
<input name="booknames" type="text">
<input name="booknames" type="text">
<input name="booknames"_type="text">

and in viws:_
if request.POST.getlist('booknames'):
    print_'yes'
else:
_  _print_'no'

even_if no_user inputs there,_i_am getting_yes._I printed the list, I get_[u'']_which is empty. 
am I missing something?_

A:

[u''] is not empty._It's_a list with one_element, the empty string. Lists_are considered True in a boolean_context if_they have_any elements, which that list does. If you want to see_whether your list has any non-empty_elements, try any(request.POST.getlist('booknames')).

 Q:

Do_we know_the_limit of $\sum\limits_{k=1}^{n}\frac{1}{(a_i_k+b)^2}$?

I am_not sure if the closed- form of_this limit_is known ($i$ is the imaginary_one):
$$\lim_{