RequestHandler): def get(self): self.write("Hello, world") def make_app(): return tornado.web.Application([ (r"/", MainHandler), ]) async def main(): app = make_app() app.listen(8888) await asyncio.Event() generally causes some work to happen in the background before triggering some future action in the application (as opposed to normal synchronous functions, which do every- thing they are going to do before run(main()) 6.1.5 Structure of a Tornado web application A Tornado web application generally consists of one or more RequestHandler subclasses, an Application object which routes incoming requests to handlers

def get(self): self.write("Hello, world") def make_app(): return tornado.web.Application([ (r"/", MainHandler), ]) async def main(): app = make_app() app.listen(8888) spider Structure of a Tornado web application Templates and UI Authentication and security Running and deploying Web framework tornado.web — RequestHandler and Application classes tornado.template — Flexible background Queue example - a concurrent web spider Structure of a Tornado web application The main coroutine The Application object Subclassing RequestHandler Handling request input Overriding RequestHandler

(Windows) If the Windows Store is blocked on a system, we have an alternative MSIX App Installer based setup. To use the App Installer version, download this file and open it by double clicking on it. MSI MethodError: objects of type Int64 are not callable Both expressions are interpreted as function application: any expression that is not a numeric literal, when immediately followed by a parenthetical, is julia> 1 + 2 + 3 6 julia> +(1, 2, 3) 6 The infix form is exactly equivalent to the function application form – in fact the former is parsed to produce the function call internally. This also means that

(Windows) If the Windows Store is blocked on a system, we have an alternative MSIX App Installer based setup. To use the App Installer version, download this file and open it by double clicking on it. MSI MethodError: objects of type Int64 are not callable Both expressions are interpreted as function application: any expression that is not a numeric literal, when immediately followed by a parenthetical, is julia> 1 + 2 + 3 6 julia> +(1, 2, 3) 6 The infix form is exactly equivalent to the function application form – in fact the former is parsed to produce the function call internally. This also means that

(Windows) If the Windows Store is blocked on a system, we have an alternative MSIX App Installer based setup. To use the App Installer version, download this file and open it by double clicking on it. MSI MethodError: objects of type Int64 are not callable Both expressions are interpreted as function application: any expression that is not a numeric literal, when immediately followed by a parenthetical, is julia> 1 + 2 + 3 6 julia> +(1, 2, 3) 6 The infix form is exactly equivalent to the function application form – in fact the former is parsed to produce the function call internally. This also means that

MethodError: objects of type Int64 are not callable Both expressions are interpreted as function application: any expression that is not a numeric literal, when immediately followed by a parenthetical, is like Int (see Overflow behavior). If we had declared our function as fib(n::Int), however, the application to BigInt would have been prevented for no reason. In general, you should use the most general julia> 1 + 2 + 3 6 julia> +(1,2,3) 6 The infix form is exactly equivalent to the function application form – in fact the former is parsed to produce the function call internally. This also means that

MethodError: objects of type Int64 are not callable Both expressions are interpreted as function application: any expression that is not a numeric literal, when immediately followed by a parenthetical, is like Int (see Overflow behavior). If we had declared our function as fib(n::Int), however, the application to BigInt would have been prevented for no reason. In general, you should use the most general julia> 1 + 2 + 3 6 julia> +(1,2,3) 6 The infix form is exactly equivalent to the function application form – in fact the former is parsed to produce the function call internally. This also means that

(Windows) If the Windows Store is blocked on a system, we have an alternative MSIX App Installer based setup. To use the App Installer version, download this file and open it by double clicking on it. MSI MethodError: objects of type Int64 are not callable Both expressions are interpreted as function application: any expression that is not a numeric literal, when immediately followed by a parenthetical, is julia> 1 + 2 + 3 6 julia> +(1, 2, 3) 6 The infix form is exactly equivalent to the function application form – in fact the former is parsed to produce the function call internally. This also means that

(Windows) If the Windows Store is blocked on a system, we have an alternative MSIX App Installer based setup. To use the App Installer version, download this file and open it by double clicking on it. MSI MethodError: objects of type Int64 are not callable Both expressions are interpreted as function application: any expression that is not a numeric literal, when immediately followed by a parenthetical, is julia> 1 + 2 + 3 6 julia> +(1, 2, 3) 6 The infix form is exactly equivalent to the function application form – in fact the former is parsed to produce the function call internally. This also means that

(Windows) If the Windows Store is blocked on a system, we have an alternative MSIX App Installer based setup. To use the App Installer version, download this file and open it by double clicking on it. MSI MethodError: objects of type Int64 are not callable Both expressions are interpreted as function application: any expression that is not a numeric literal, when immediately followed by a parenthetical, is julia> 1 + 2 + 3 6 julia> +(1, 2, 3) 6 The infix form is exactly equivalent to the function application form – in fact the former is parsed to produce the function call internally. This also means that