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[Solved] CloudDeploy of an APIFunction not working properly

Keonwoo Kim

Posted 4 years ago

My code is as follows: apiFunc[opt_, f_] := Switch[ opt, "derivative", FullForm[Collect[ Derivative[f, x], x, FullSimplify]], "integrate", FullForm[Collect[ Integrate[f, x], x, FullSimplify]], "nabla", FullForm[Collect[(D[#,x]&) /@ f, x, FullSimplify]], _, "invalid option" ]; func = APIFunction[{"opt"->"String","f"->"Expression"}, apiFunc[#opt,#f] &]; api = CloudDeploy[func] When I run `apiFunc["nabla", List[ArcSin[x]]]` on the notebook, it gives the desired result: List[Power[Plus[1,Times[-1,Power[x,2]]],Rational[-1,2]]] However, when I get the response from the web api, it gives FullForm[{1/Sqrt[1 - x^2]}] Why are they different? Is there any way to get the desired result on the web api? I have the basic plan though. Does it matter?

My code is as follows:

apiFunc[opt_, f_] := Switch[
    opt,
    "derivative", FullForm[Collect[ Derivative[f, x], x, FullSimplify]],
    "integrate", FullForm[Collect[ Integrate[f, x], x, FullSimplify]],
    "nabla", FullForm[Collect[(D[#,x]&) /@ f, x, FullSimplify]],
    _, "invalid option"
];

func = APIFunction[{"opt"->"String","f"->"Expression"}, apiFunc[#opt,#f] &];
api = CloudDeploy[func]

When I run apiFunc["nabla", List[ArcSin[x]]] on the notebook, it gives the desired result:

List[Power[Plus[1,Times[-1,Power[x,2]]],Rational[-1,2]]]

However, when I get the response from the web api, it gives

FullForm[{1/Sqrt[1 - x^2]}]

Why are they different? Is there any way to get the desired result on the web api?

I have the basic plan though. Does it matter?

POSTED BY: Keonwoo Kim

2 Replies

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Joel Klein

Joel Klein, WOLFRAM

Posted 3 years ago

Right, as the docs say, `FullForm` is a printing construct, so you can see it (a) in an output cell in a notebook (b) in an output of the command-line kernel, (c) when you pass it to `ToString` which uses OutputForm by default. To fix the above so you get the full-form, I would make two changes: wrap `ToString` around your apiFunc call to turn the FullForm into a string use the 3rd argument of `APIFunction` to specify that you want the `"Text"` export format (the default is "WL" a.k.a. "Package", which gives an InputForm rendering of the expression) func = APIFunction[{"opt" -> "String", "f" -> "Expression"}, ToString[apiFunc[#opt, #f]] &, "Text"]

POSTED BY: Joel Klein

Keonwoo Kim

Posted 4 years ago

Maybe not a problem with CloudDeploy.. `wolframscript` shows a similar problem: $ wolframscript Wolfram Language 12.1.0 Engine for Linux x86 (64-bit) Copyright 1988-2020 Wolfram Research, Inc. In[1]:= Collect[D[3 x^2 + 6 x - 45 Exp[x], x], x, FullSimplify] // FullForm Out[1]//FullForm= Plus[6, Times[-45, Power[E, x]], Times[6, x]] In[2]:= $ wolframscript -code 'Collect[D[3 x^2 + 6 x - 45 Exp[x], x], x, FullSimplify] // FullForm' FullForm[6 - 45E^x + 6x] Update: I found a similar problem: https://mathematica.stackexchange.com/questions/199991/texform-doesnt-work-in-wolframscript

Maybe not a problem with CloudDeploy.. wolframscript shows a similar problem:

$ wolframscript
Wolfram Language 12.1.0 Engine for Linux x86 (64-bit)
Copyright 1988-2020 Wolfram Research, Inc.

In[1]:= Collect[D[3 x^2 + 6 x - 45 Exp[x], x], x, FullSimplify] // FullForm          

Out[1]//FullForm= Plus[6, Times[-45, Power[E, x]], Times[6, x]]

In[2]:=                                                                              
$ wolframscript -code 'Collect[D[3 x^2 + 6 x - 45 Exp[x], x], x, FullSimplify] // FullForm'
FullForm[6 - 45*E^x + 6*x]

Update: I found a similar problem: https://mathematica.stackexchange.com/questions/199991/texform-doesnt-work-in-wolframscript

POSTED BY: Keonwoo Kim

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