《学习PYTHON 第三版(英文影印版)》章节试读

《学习PYTHON 第三版(英文影印版)》的笔记-第82页

Every object in Python is classified as either immutable (unchangeable) or not. In terms
of the core types, numbers, strings, and tuples are immutable; lists and dictionaries are
not (they can be changed in-place freely). Among other things, immutability can be
used to guarantee that an object remains constant throughout your program.