add curvefit function code

cloud-functions/python/functions/curvefit/main.py

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+import functions_framework
+from flask import Flask, jsonify, send_file
+from flask_cors import CORS
+import matplotlib.pyplot as plt
+from matplotlib.backends.backend_svg import FigureCanvasSVG
+import io
+import os
+import torch
+
+app = Flask(__name__)
+CORS(app)
+
+def create_svg_plot():
+    weight = 0.7
+    bias = 0.3
+
+    start = 0
+    end = 1
+    step = 0.02
+    X = torch.arange(start, end, step).unsqueeze(dim=1)
+    Y = weight * X + bias
+    # print(Y)
+
+    x = [1, 2, 3, 4, 5]
+    y = [2, 4, 6, 8, 10]
+
+    fig, ax = plt.subplots()
+    ax.plot(x, y)
+    ax.set_title('Sample Plot')
+    ax.set_xlabel('X-axis')
+    ax.set_ylabel('Y-axis')
+
+    svg_output = io.StringIO()
+    canvas = FigureCanvasSVG(fig)
+    canvas.print_svg(svg_output)
+
+    # Close the plot to free up resources
+    plt.close(fig)
+
+    return svg_output.getvalue()
+
+@functions_framework.http
+def curvefit(request):
+    """HTTP Cloud Function.
+    Args:
+        request (flask.Request): The request object.
+        <https://flask.palletsprojects.com/en/1.1.x/api/#incoming-request-data>
+    Returns:
+        The response text, or any set of values that can be turned into a
+        Response object using `make_response`
+        <https://flask.palletsprojects.com/en/1.1.x/api/#flask.make_response>.
+    """
+    if request.method == 'OPTIONS':
+        headers = {
+            'Access-Control-Allow-Origin': '*',
+            'Access-Control-Allow-Methods': 'GET, POST, OPTIONS',
+            'Access-Control-Allow-Headers': 'Content-Type',
+            # 'Access-Control-Max-Age': '3600'
+        }
+
+        return ('', 204, headers)
+
+    headers = {
+        'Access-Control-Allow-Origin': '*'
+    }
+
+    svg_plot = create_svg_plot()
+
+    output_path = os.getcwd() + "/" + "plot.svg"
+
+    with open(output_path,'rb') as f:
+        file_data = io.BytesIO(f.read())
+
+    # return (jsonify({"plot": svg_plot}), 200, headers)
+    return send_file(file_data, as_attachment=False, download_name= "plot.svg", mimetype='image/svg+xml')

cloud-functions/python/functions/curvefit/requirements.txt

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+functions-framework==3.*
+firebase_functions~=0.1.0
+pandas==2.0.3
+openpyxl==3.1.2
+firebase-admin==6.2.0
+scikit-learn==1.3.1
+matplotlib==3.8.0
+torch==2.1.0
+torchaudio==2.1.0
+torchvision==0.16.0