Welcome to CherryPyFit, an example of creating a web-based curve and surface fitting tool with Python 3 CherryPy and the pyeq3 fitting library. see http://zunzun/com/CommonProblems/ Step 1: Install cherrypy, scipy and matplotlib On Debian or Ubuntu Linux, you can use this command: sudo apt-get install python3-cherrypy3 python3-scipy python3-matplotlib python3-pil On other operating systems, try the Canopy Express Free version: https://store.enthought.com/ and then install CherryPy using instructions from: http://docs.cherrypy.org/en/latest/install.html Finally, install the pyeq3 fitting library using pip: pip3 install pyeq3 Step 2: Run the CherryPyFit example From a command prompt run this command: python3 CherryPyFit.py The command prompt should then display: [date] ENGINE Serving on http://127.0.0.1:8080 When you open this URL you should see a form that allows curve and surface fitting, with graphs. Use Control-C to exit the CherryPy development server. Step 3: Celebrate You are now curve and surface fitting data using CherryPy! If you would like to create a feature complete web site with django, see https://bitbucket.org/zunzuncode/zunzunsite3 which has "function finding" and animated surface rotations along with SMP parallel processing for multi-core servers.