This reference manual describes the syntax and “core semantics” of the language. It is terse, but attempts to be exact and complete. The semantics of non-essential built-in object types and of the built-in functions and modules are described in Python 标准库 . For an informal introduction to the language, see Python 教程 . For C or C++ programmers, two additional manuals exist: 扩展和嵌入 Python 解释器 describes the high-level picture of how to write a Python extension module, and the Python/C API 参考手册 describes the interfaces available to C/C++ programmers in detail.