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- . def files C C++ DLLs - Stack Overflow
The advantage of def file is that, it helps you to maintain the backword compatibility with the already realsed dlls i e it maintains the ordinal numbers for apis Suppose you add a new api in the dll, then the linker looks at your def file genearate the ordinal number for the ne wapi such that the ordinal numbers for the old apis are intact
- How do I define a function with optional arguments?
def add(x,y): return x+ y # calling this will require only x and y add(2,3) # 5 If we want to add as many arguments as we may want, we shall just use *args which shall be a list of more arguments than the number of formal arguments that you previously defined (x and y)
- python - Why do some functions have underscores - Stack Overflow
The other respondents are correct in describing the double leading and trailing underscores as a naming convention for "special" or "magic" methods While you can call these methods directly ([10, 20] __len__() for example), the presence of the underscores is a hint that these methods are intended to be invoked indirectly (len([10, 20]) for example) Most python operators have an associated
- TypeError: type object is not subscriptable in a function signature
The following answer only applies to Python < 3 9 The expression list[int] is attempting to subscript the object list, which is a class Class objects are of the type of their metaclass, which is type in this case Since type does not define a __getitem__ method, you can't do list[ ] To do this correctly, you need to import typing List and use that instead of the built-in list in your type
- python - Differences between `class` and `def` - Stack Overflow
What is the main difference between class and def in python? Can a class in python interact with django UI (buttons)?
- What does the at (@) symbol do in Python? - Stack Overflow
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) immediately after defining hello, or even defining hello as a lambda in the arguments to app route? (The latter example is common with Node js http Server and Express routes )
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