There is an incredibly large spectrum of possible causes for program bugs, including simple typos, "thinkos," hidden limitations of underlying abstractions, and outright bugs in abstractions or their implementation.

Now, it's my belief that Python is a lot easier than to teach to students programming and teach them C or C++ or Java at the same time because all the details of the languages are so much harder. Other scripting languages really don't work very well there either.

Modern programs must handle Unicode —Python has excellent support for Unicode, and will keep getting better.

Python is an experiment in how much freedom programmers need. Too much freedom and nobody can read another's code; too little and expressiveness is endangered.

It's easy to make mistakes that only come out much later, after you've already implemented a lot of code. You'll realize Oh I should have used a different type of data structure. Start over from scratch.

There is an incredibly large spectrum of possible causes for program bugs, including simple typos, "thinkos," hidden limitations of underlying abstractions, and outright bugs in abstractions or their implementation.

Mark Hammond is working in this area, with Windows Scripting Host. It is definitely an area where Python fits almost perfectly. That's quite independent from Java, actually.