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Content Source: Python Web Development In Python, you can increase the value of a variable by 1 or reduce it by 1 using the augmented assignment operators. The code spam += 1 and spam -= 1 increments and decrements the numeric values in spam by 1, respectively. Other languages such as C++ and Java have the ++ and -- operators for incrementing and decrementing variables. (The name of C++ itself reflects this; the name is a tongue-in-cheek joke that indicates it’s an enhanced form of the C language.) Code in C++ and Java could have ++spam or spam++. Python wisely doesn’t include these operators; they are notoriously susceptible to subtle bugs. Reading more

Content Source: Python Web Development The era of static websites has passed. Now users demand dynamic content and application like look and feel. Instead of constantly reloading the page and hitting F5, the page should adjust itself automatically. Many of this can be accomplished with simple asynchronous requests from javascript. But what if you want to update your app only when there is a new data available on the server? You could send a ton of requests in a loop but that’ll use a lot of bandwidth and with more users could potentially DDoS your server or make it very slow. Web technologies are constantly evolving so it’s not exceptional that we have a solution for this problem. It’s called WebSockets. Websockets allows us to establish a stateful connection between browser and server so we can exchange pieces of information in both directions. It’s more efficient than standard request and response cycle from HTTP. Unfortunately, WebSockets are handled differentl...