Python is such huge subject, it is difficult to describe in few words.
I think the key to Python's success as a development platform is the range of operating environments where, if not the best, it is at least very good. That is what makes it unique.
Environments where it very good include:
In general, you can do more with Python than any other language.
I'm probably preaching to the converted, but if the question is 'Why Python', the answer is 'Because it works'.
Eventually, there will be info about links, configs, dependencies, etc.