与其他语言和可选方法的兼容性。
Compatibility with other languages and alternative approaches.
因此，Python 3000将会作为第一个放弃向后兼容性的Python版本，目的就是要让Python向着最好的语言前进。
The idea was that Python 3000 would be the first Python release to give up backwards compatibility in favor of making it the best language going forward.
虽然新版本对该核心语言做了很多改进，但还是打破了与2 . x版本的向后兼容性。
Although many improvements have been made to the core language, the new version will break backwards compatibility with the 2.x line. Other changes have been anticipated for a while, such as.
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