an optional argument that specifies the characters to strip. For
example, "Foo!!!?!?!?".rstrip("?!") -> "Foo".
-- Dictionaries have a new class method, fromkeys(iterable, value=None).
- It constructs a new dictionary with keys taken from the iterable and
- all values set to a single value. It is used for building membership
- tests and for removing duplicates from sequences.
+- There's a new dictionary constructor (a class method of the dict
+ class), dict.fromkeys(iterable, value=None). It constructs a
+ dictionary with keys taken from the iterable and all values set to a
+ single value. It can be used for building sets and for removing
+ duplicates from sequences.
- Added a new dict method pop(key). This removes and returns the
value corresponding to key. [SF patch #539949]