How to start a server with python framework Pyramid

This article shows how to start a simple server with Pyramid.
Requirements
First, you need the following programs available on your system:
  • python3
  • pip
  • venv
  • It all should be provided with a python package in your operating system.
    Starting virtual environment
    To avoid polluting the global scope with package versions, we can start & use the virtual environment:
    $ python3 -m venv .venv
    When successful, this command creates .venv folder & produces no output.
    To switch to the virtual env:
    $ source .venv/bin/activate
    (.venv) $
    The current console will use .venv as the location for packages managed by pip.
    Installing the dependency
    (.venv) $ pip install pyramid                                                                                                                                                              
    Collecting pyramid                                                                                                                                                                     
      Downloading pyramid-2.0-py3-none-any.whl (246 kB)                                                                                                                                    
         |████████████████████████████████| 246 kB 2.4 MB/s                                    
    Collecting hupper>=1.5                                                                                                                                                                 
      Using cached hupper-1.10.3-py2.py3-none-any.whl (26 kB)                                                                                                                              
    Requirement already satisfied: setuptools in ./.venv/lib/python3.8/site-packages (from pyramid) (44.0.0)
    Collecting webob>=1.8.3                                                                                                                                                                
      Using cached WebOb-1.8.7-py2.py3-none-any.whl (114 kB)                                                                                                                               
    Collecting zope.interface>=3.8.0                                                                                                                                                       
      Using cached zope.interface-5.4.0-cp38-cp38-manylinux2010_x86_64.whl (259 kB)                                                                                                        
    Collecting plaster-pastedeploy                                                                                                                                                         
      Using cached plaster_pastedeploy-0.7-py2.py3-none-any.whl (7.8 kB)                                                                                                                   
    Collecting translationstring>=0.4                                                          
      Using cached translationstring-1.4-py2.py3-none-any.whl (15 kB)       
    Collecting venusian>=1.0                                                                                                                                                               
      Using cached venusian-3.0.0-py3-none-any.whl (13 kB)                                                                                                                                 
    Collecting plaster
      Using cached plaster-1.0-py2.py3-none-any.whl (14 kB)
    Collecting zope.deprecation>=3.5.0
      Using cached zope.deprecation-4.4.0-py2.py3-none-any.whl (10 kB)
    Collecting PasteDeploy>=2.0
      Using cached PasteDeploy-2.1.1-py2.py3-none-any.whl (17 kB)
    Installing collected packages: hupper, webob, zope.interface, PasteDeploy, plaster, plaster-pastedeploy, translationstring, venusian, zope.deprecation, pyramid
    Successfully installed PasteDeploy-2.1.1 hupper-1.10.3 plaster-1.0 plaster-pastedeploy-0.7 pyramid-2.0 translationstring-1.4 venusian-3.0.0 webob-1.8.7 zope.deprecation-4.4.0 zope.int
    erface-5.4.0
    Code
    I use a slightly modified example from the documentation. server.py:
    from wsgiref.simple_server import make_server
    from pyramid.config import Configurator
    from pyramid.response import Response
    
    
    def hello_world(request):
        return Response('Hello World!')
    
    
    if __name__ == '__main__':
        HOST = '0.0.0.0'
        PORT = 6543
    
        with Configurator() as config:
            config.add_route('hello', '/')
            config.add_view(hello_world, route_name='hello')
            app = config.make_wsgi_app()
        server = make_server(HOST, PORT, app)
        print(f'Starting server at {HOST}:{PORT}') 
        server.serve_forever()
    I moved HOST & PORT into variables and logged them to the console. Otherwise, the server was quietly working without notifying the user about its presence.
    Running server
    (.venv) $ python3 server.py
    Starting server at 0.0.0.0:6543
    The server works as expected:
    Links
    Summary
    We have seen how to start a simple Pyramid server.

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    How to start a server with python framework Pyramid