conventions in this bookyou will find number of text styles that distinguish between different kinds of information here are some examples of these styles and an explanation of their meaning code words in textdatabase table namesfolder namesfilenamesfile extensionspathnamesdummy urlsuser inputand twitter handles are shown as follows"this repetitive construct could be simple while loop or any other kind of loop block of code is set as followsdef dequeue(self)if not self outbound_stackwhile self inbound_stackself outbound_stack append(self inbound_stack pop()return self outbound_stack pop(when we wish to draw your attention to particular part of code blockthe relevant lines or items are set in bolddef dequeue(self)if not self outbound_stackwhile self inbound_stackself outbound_stack append(self inbound_stack pop()return self outbound_stack pop(any command-line input or output is written as followspython bubble py new terms and important words are shown in bold words that you see on the screenfor examplein menus or dialog boxesappear in the text like this"clicking the next button moves you to the next screen warnings or important notes appear in box like this tips and tricks appear like this [