function(a, b) Note that file is one of Python's core modules, so I suggest you change the filename of file.py to something else. Note that if you're trying to import functions from a.py to a file …

For a language-agnostic consideration of the design decision, see What is the advantage of having this/self pointer mandatory explicit?. To close debugging questions where OP omitted a …

def __enter__(self): return self def __exit__(self, type, value, tb): self.stream.close() Here is the complete code.

What does the @ symbol do in Python?What's the syntactic or practical benefit of having decorators here, instead of (for example) just calling something like app.route("/", hello) …

As is, it does absolutely nothing. It is a type annotation for the main function that simply states that this function returns None. Type annotations were introduced in Python 3.5 and are specified …

def my_function(): x = 3 y = 7 the interpreter will interpret the empty line before y = 7 as the end of the expression, i.e. that you're done defining your function, and the next line - y = 7 will have …

I would like to return two values from a function in two separate variables. What would you expect it to look like on the calling end? You can't write a = select_choice(); b = select_choice() …

I am getting a NoClassDefFoundError when I run my Java application. What is typically the cause of this?

def foo(): if 1: print 1 Please note that before if, there is a tab, and before print there is 8 spaces. Output: File "<stdin>", line 3 print 1 ^ IndentationError: expected an indented block It's quite …

I would like to understand how the built-in function property works. What confuses me is that property can also be used as a decorator, but it only takes arguments when used as a built-in …