Python: Cut off the last word of a sentence?

What's the best way to slice the last word from a block of text?

I can think of

1. Split it to a list (by spaces) and removing the last item, then reconcatenating the list.
2. Use a regular expression to replace the last word.

I'm currently taking approach #1, but I don't know how to concatenate the list...

content = content[position-1:position+249] # Content
words = string.split(content, ' ')
words = words[len[words] -1] # Cut of the last word

Any code examples are much appreciated.

Actually you don't need to split all words. You can split your text by last space symbol into two parts using rsplit.

Example:

>>> text = 'Python: Cut off the last word of a sentence?'
>>> text.rsplit(' ', 1)[0]
'Python: Cut off the last word of a'

rsplit is a shorthand for "reverse split", and unlike regular split works from the end of a string. The second parameter is a maximum number of splits to make - e.g. value of 1 will give you two-element list as a result (since there was a single split made, which resulted in two pieces of the input string).