PythonKit throws exception

[shadi abu samra]

Hello,

When call python function with throw exception from swift the app crashed

Fatal error: 'try!' expression unexpectedly raised an error: Python exception: This is an example exception for GET

Swift code

do {

            let model = try Python.attemptImport("FinalTest")

            let value = try? model.get(true)

        } catch {

            print("==> error: \(error)")

        } 

Python function 

def swift_call_target():

    raise Exception("This is an example exception for GET")

Is there any way to call throw function? 

Please advice

Thanks 

[Brennan Saeta]

Hi Shadi,

Unfortunately, I don't quite understand your code snippet. Did you leave some code out? 

All the best,

-Brennan

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[shadi abu samra]

Hi Brennan,

The Swift code use Pythonkit to call swift_call_target in Python 

But the Python swift_call_target function throw exception and in this case the swift app crash 

I need way to use do catch in swift to catch  exception error

--

Regards Shadi

[Ravindra Sonkar]

I'm getting the same problem. Please help up out.

[shadi abu samra]

For now I make python function code return tuple of (data,error)

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Regards Shadi

[Ravindra Sonkar]

can you share a sample of it?

[shadi abu samra]

@Ravindra Sonkar 

I find a way to catch python exceptions please check below code and let me know if it works as expected

 func callFunction(name: String, withArguments args: [PythonConvertible]) -> Result<PythonObject, Error> {

        guard let functionObject = self.checking[dynamicMember: name] else {

            return .failure(CustomError.with(localizedDescription: "Could not access PythonObject member \(name)"))

        }

        do {

            let data = try functionObject.throwing.dynamicallyCall(withArguments: args)

            return .success(data)

        } catch {

            let pythonError = error as? PythonError

            let localizedDescription = pythonError?.description ?? error.localizedDescription

            return .failure(CustomError.with(localizedDescription: localizedDescription))

        }

    }

 

Regards,
------------------
Shadi Awwad.
Sr. Mobile developer. 

Email: eng.sha...@gmail.com
Mobile: +972569730885

[Ravindra Sonkar]

Hi @Shadi,

It didn't resolve my problem.

Here is what I'm doing 

  private let gp = Python.import("gphoto2")

  private lazy var context = gp.Context()

  private lazy var camera_config = camera.get_config(context)

  let result = callFunction(name: "capture", withArguments: [gp.GP_CAPTURE_IMAGE])

    switch result {

    case .success(let py):

      print(py)

    case .failure(let err) :

      print(err.localizedDescription)

      break

    }

Checcking[dynamicMember : name ] is getting nil

Here is what I do in my code.

        let file_path = camera.capture(gp.GP_CAPTURE_IMAGE)

Please can you look it I did what you have guided.

Thank you.

[Ravindra Sonkar]

@shadi abu samra