Python write a recursive function, displayfiles, that expects a pathname as an argument. the pathname can be either the name of a file or the name of a directory. if the pathname refers to a file, its name is displayed, followed by its contents. otherwise, if the pathname refers to a directory, the function is applied to each name in the directory. test this function in a new program.

How to launch an app: steps to be successful? launching an app is a great idea, but it’s not that easy as we supposed to think. the majority of mobile applications don’t generate revenue because companies aren’t ready to be competitive. referring to our experience in successfully building and launching apps we hope to you omit these difficulties. we are going to talk about ideas, marketing, testing your product, its development, distribution and support. you will learn 8 product launch stages to succeed.