subclassing list

[Uwe Mayer]

Hi,

I want to subclass "list". The documentation states to prefer subclassing
list instead of UserList. How to you clear the contents of a list subclass
without creating a new object?

Thanks in advance
Uwe

[Fuzzyman]

class newList(list):
def clear(self):
self[:] = []

is one way.
HTH

Regards,

Fuzzy
http://www.voidspace.org.uk/python/index.shtml

[Richie Hindle]

[Uwe]

How [do] you clear the contents of a list subclass
without creating a new object?

Use the paranoia emoticon: "del x[:]". For example:

class L(list): .... pass
.... x = L()
x.append("Spam")
del x[:]
x [] type(x) <class '__main__.L'>

with-thanks-to-Gordon-McMillan-ly y'rs,

--
Richie Hindle
ri****@entrian.com