Inserting a string into a list without getting split into characters

I'm new to Python and can't find a way to insert a string into a list without it getting split into individual characters:

>>> list=['hello','world']
>>> list
['hello', 'world']
>>> list[:0]='foo'
>>> list
['f', 'o', 'o', 'hello', 'world']

What should I do to have:

['foo', 'hello', 'world']

Searched the docs and the Web, but it has not been my day.

To add to the end of the list:

list.append('foo')

To insert at the beginning:

list.insert(0, 'foo')

Sticking to the method you are using to insert it, use

list[:0] = ['foo']

http://docs.python.org/release/2.6.6/library/stdtypes.html#mutable-sequence-types

Another option is using the overloaded + operator:

>>> l = ['hello','world']
>>> l = ['foo'] + l
>>> l
['foo', 'hello', 'world']

best put brackets around foo, and use +=

list+=['foo']