C#•4w ago

Hi guys i have a problem with my c# - python code!

I have a code for image recognizing. It works fine in my vs code. Heres a screenshot And this code works fine in visual studio in python solution. But when I try to run it inside my c# code it does not work. My model is loading properl;y and path to my file is fine too. Libraries connects also in proper way. I run this code using pythonnet inside c#. But my code stops on that line "prediction = model.predict(processed_image)" with that error. Mb someone knows how to fix it or have a solution?

9 Replies

canton7•4w ago

What's the call stack on that exception? Also please post code as text, not images. See $code. I want to ctrl-f through it to see if there's a write function anywhere, but I can't, because it's an image.

MODiX•4w ago

To post C# code type the following: ```cs // code here ``` Get an example by typing $codegif in chat For longer snippets, use: https://paste.mod.gg/

Joe BlackOP•4w ago

private void analyzeBtn_Click(object sender, EventArgs e) {
    if (String.IsNullOrEmpty(this.filePathLb.Text) == true) return;

    //python(version) dll path on machine 
    Runtime.PythonDLL = @"C:\Users\D1mentrrr\AppData\Local\Programs\Python\Python311\python311.dll";
    PythonEngine.Initialize();

    using (Py.GIL()) {
        // Import sys module
        dynamic sys = Py.Import("sys");

        //current bin/debug directory
        sys.path.append(@".");

        // Python scrypt
        dynamic script = Py.Import("scrypt");
        string message = script.ImageAnalyze("D:\\VisualStudio\\PythonApplication1\\12630.png"); // dont look at the path its not used and its just a plug for function

        MessageBox.Show(message);
    }
}

private void analyzeBtn_Click(object sender, EventArgs e) {
    if (String.IsNullOrEmpty(this.filePathLb.Text) == true) return;

    //python(version) dll path on machine 
    Runtime.PythonDLL = @"C:\Users\D1mentrrr\AppData\Local\Programs\Python\Python311\python311.dll";
    PythonEngine.Initialize();

    using (Py.GIL()) {
        // Import sys module
        dynamic sys = Py.Import("sys");

        //current bin/debug directory
        sys.path.append(@".");

        // Python scrypt
        dynamic script = Py.Import("scrypt");
        string message = script.ImageAnalyze("D:\\VisualStudio\\PythonApplication1\\12630.png"); // dont look at the path its not used and its just a plug for function

        MessageBox.Show(message);
    }
}

Its c# code that needs to get just a string from my python code. I'm using pythonnet here for that. There's python code

//python code 
def ImageAnalyze(filePath):
    import os
    from tensorflow.keras.models import load_model
    from PIL import Image
    import numpy as np
    model = load_model('D:\\VisualStudio\\RoadSignImageAnalyzer\\bin\\Debug\\net8.0-windows\\traffic_classifier.keras', compile = False)
    if os.path.exists('D:\\VisualStudio\\RoadSignImageAnalyzer\\bin\\Debug\\net8.0-windows\\traffic_classifier.keras') is False:
        return "Keras not found"
    def preprocess_image(image_path):
        try:
            image = Image.open(image_path)
            image = image.resize((30, 30))
            image = np.array(image)

            image = np.expand_dims(image, axis=0)  
            return image
        except Exception as e:
            print(f"Error processing image: {e}")
            return None
    processed_image = preprocess_image('D:\\VisualStudio\\RoadSignImageAnalyzer\\bin\\Debug\\net8.0-windows\\12630.png')
    if os.path.exists('D:\\VisualStudio\\RoadSignImageAnalyzer\\bin\\Debug\\net8.0-windows\\12630.png') is False:
        return "Phott not found"
    if processed_image is not None:
        prediction = model.predict(processed_image)
        predicted_class = np.argmax(prediction, axis=1)[0]
        message = f"Predicted Class: {predicted_class}"
        return message
    else:
        return "Error: Unable to process image"

//python code 
def ImageAnalyze(filePath):
    import os
    from tensorflow.keras.models import load_model
    from PIL import Image
    import numpy as np
    model = load_model('D:\\VisualStudio\\RoadSignImageAnalyzer\\bin\\Debug\\net8.0-windows\\traffic_classifier.keras', compile = False)
    if os.path.exists('D:\\VisualStudio\\RoadSignImageAnalyzer\\bin\\Debug\\net8.0-windows\\traffic_classifier.keras') is False:
        return "Keras not found"
    def preprocess_image(image_path):
        try:
            image = Image.open(image_path)
            image = image.resize((30, 30))
            image = np.array(image)

            image = np.expand_dims(image, axis=0)  
            return image
        except Exception as e:
            print(f"Error processing image: {e}")
            return None
    processed_image = preprocess_image('D:\\VisualStudio\\RoadSignImageAnalyzer\\bin\\Debug\\net8.0-windows\\12630.png')
    if os.path.exists('D:\\VisualStudio\\RoadSignImageAnalyzer\\bin\\Debug\\net8.0-windows\\12630.png') is False:
        return "Phott not found"
    if processed_image is not None:
        prediction = model.predict(processed_image)
        predicted_class = np.argmax(prediction, axis=1)[0]
        message = f"Predicted Class: {predicted_class}"
        return message
    else:
        return "Error: Unable to process image"

it works well. libraries also imports well(i checked the possibility to return every library version as string from that method so libraries is not a problem. Also filepath is fine and kernel trained model is fine too. This code works in another solution or in vs code jupiter notebook or even from my desctop in cmd/ But when i start it from c# it stops on that line

 prediction = model.predict(processed_image)

 prediction = model.predict(processed_image)

and then i heave this kind of exception Python.Runtime.PythonException: ''NoneType' object has no attribute 'write''

Joe BlackOP•4w ago

also there is my call stack

Joe BlackOP•4w ago

and there is exception screenshot

Joe BlackOP•4w ago

@canton7

Joe BlackOP•4w ago

and there s a trained model and a picture wich i used for recognizing

traffic_classifier.k...

Joe BlackOP•4w ago

Desired output is Predicted class: 35

Joe BlackOP•4w ago

Its not necessary because the same code works in just python solution but dont work when i start it in c#. I already had an advice about ctrl+f for .where so it's not the reason for exception

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Hi guys i have a problem with my c# - python code!