Help me override append function of list object

[jeremito]

I have created a class that inherits from the list object. I want to
override the append function to allow my class to append several
copies at the same time with one function call. I want to do
something like:

import copy

class MyList(list):
__init__(self):
pass

def append(self, object, n=1):
for i in xrange(n):
self.append(copy.copy(object))

Now I know this doesn't work because I overwrite append, but want the
original functionality of the list object. Can someone help me?

Thanks,
Jeremy

 

[Peter Otten]

I have created a class that inherits from the list object. I want to
override the append function to allow my class to append several
copies at the same time with one function call. I want to do
something like:

import copy

class MyList(list):
__init__(self):
pass

def append(self, object, n=1):
for i in xrange(n):
self.append(copy.copy(object))

Now I know this doesn't work because I overwrite append, but want the
original functionality of the list object. Can someone help me?

Use list.append(self, obj) or super(MyList, self).append(obj), e. g.:
.... def append(self, obj, n=1):
.... for i in xrange(n):
.... super(List, self).append(copy.copy(obj))
....[42, 42, 42]

Peter

 

[jeremito]

I have created a class that inherits from the list object. I want to
override the append function to allow my class to append several
copies at the same time with one function call. I want to do
something like:

import copy

class MyList(list):
__init__(self):
pass

def append(self, object, n=1):
for i in xrange(n):
self.append(copy.copy(object))

Now I know this doesn't work because I overwrite append, but want the
original functionality of the list object. Can someone help me?Use list.append(self, obj) or super(MyList, self).append(obj), e. g.:

... for i in xrange(n):
... super(List, self).append(copy.copy(obj))
...>>> items = List()

items.append(42, 3)
items[42, 42, 42]

Peter

Thank you so much. I'm glad it is so easy.
Jeremy