static PyStringObject *characters[UCHAR_MAX + 1]; ... /* This dictionary holds all interned strings. Note that references to strings in this dictionary are *not* counted in the string's ob_refcnt. When the interned string reaches a refcnt of 0 the st…
py一切皆对象的实现 Python中对象分为两类: 定长(int等), 非定长(list/dict等) 所有对象都有一些相同的东西, 源码中定义为PyObject和PyVarObject, 两个定义都有一个共同的头部定义PyObject_HEAD(其实PyVarObject有自己的头部定义PyObject_VAR_HEAD, 但其实际上用的也是PyObject_HEAD).比如这里面就有那个引用计数 /* Nothing is actually declared to be a PyObject…
#!/usr/bin/env python #-*- coding=utf-8 -*- small_ints = dict() for i in range(-10000,10000): small_ints[i] = id(i) for i in range(-10000,10000): if id(i) != small_ints[i]: del small_ints[i] print("[%s, %s]"%(min(small_ints.keys()), max(small_in…