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| -rw-r--r-- | Doc/library/functions.rst | 24 |
1 files changed, 15 insertions, 9 deletions
diff --git a/Doc/library/functions.rst b/Doc/library/functions.rst index 97209a4..62b37c0 100644 --- a/Doc/library/functions.rst +++ b/Doc/library/functions.rst @@ -1025,25 +1025,31 @@ available. They are listed here in alphabetical order. sequence of strings is by calling ``''.join(sequence)``. -.. function:: super(type[, object-or-type]) +.. function:: super([type[, object-or-type]]) - .. XXX need to document PEP "new super" + .. XXX updated as per http://www.artima.com/weblogs/viewpost.jsp?thread=208549 but needs checking - Return the superclass of *type*. If the second argument is omitted the super - object returned is unbound. If the second argument is an object, - ``isinstance(obj, type)`` must be true. If the second argument is a type, + Return the superclass of *type*. + + Calling :func:`super()` without arguments is equivalent to + ``super(this_class, first_arg)``. If called with one + argument the super object returned is unbound. If called with two + arguments and the second argument is an object, ``isinstance(obj, + type)`` must be true. If the second argument is a type, ``issubclass(type2, type)`` must be true. A typical use for calling a cooperative superclass method is:: class C(B): - def meth(self, arg): - super(C, self).meth(arg) + def method(self, arg): + super().method(arg) # This does the same thing as: super(C, self).method(arg) Note that :func:`super` is implemented as part of the binding process for - explicit dotted attribute lookups such as ``super(C, self).__getitem__(name)``. + explicit dotted attribute lookups such as ``super().__getitem__(name)``. Accordingly, :func:`super` is undefined for implicit lookups using statements or - operators such as ``super(C, self)[name]``. + operators such as ``super()[name]``. Also, :func:`super` is not + limited to use inside methods: under the hood it searches the stack + frame for the class (``__class__``) and the first argument. .. function:: tuple([iterable]) |