# waitress-serve > Pure Python WSGI HTTP Server. > More information: . - Run a Python web app: `waitress-serve {{import.path:wsgi_func}}` - Listen on port 8080 on localhost: `waitress-serve --listen={{localhost}}:{{8080}} {{import.path:wsgi_func}}` - Start waitress on a Unix socket: `waitress-serve --unix-socket={{path/to/socket}} {{import.path:wsgi_func}}` - Use 4 threads to process requests: `waitress-serve --threads={{4}} {{import.path:wsgifunc}}` - Call a factory method that returns a WSGI object: `waitress-serve --call {{import.path.wsgi_factory}}` - Use the HTTPS URL scheme: `waitress-serve --url-scheme={{https}} {{import.path:wsgi_func}}`