将控制流图中的节点转换为较小的可执行语句,称为字节码 最终生成code object 6.执行 从pyc文件中读取code object或将内存中code object传递给执行组件。每个字节码操作被封装为堆栈帧来执行,具体内容可以参考:您的CPython源代码指南 - 真正的Python (realpython.com) CPython中的对象 Python中一切皆对象,内置了许...
CAUTION: Generic code manipulating subtypes of PyVarObject has to aware that ints abuse ob_size's sign bit. */ struct _longobject { PyObject_VAR_HEAD digit ob_digit[1]; }; longobject 使用了 ob_digit[] 作为实际的数据的数组,用 ob_size 来表示数据的正负关系,这个实现得非常简单其中还包含...
请点击OK查看目标代码\n目标代码已写入文件objCodeFile.txt', QMessageBox.Yes) codeDialog = QDialog(self.MainWindow) codeDialog.resize(900,600) hhbox = QHBoxLayout() objCodeTextBox = QTextEdit(codeDialog) #objCodeTextBox.setSizePolicy() hhbox.addWidget(objCodeTextBox) codeDialog.setLayout(hhbox...
import of source modules. Set to 0 by the -B command line option and the PYTHONDONTWRITEBYTECODE environment variable. If set to -1 (default), it is set to !Py_DontWriteBytecodeFlag. */ int write_bytecode; /* If greater than 0, enable the verbose mode: print a message each time ...
It turns out, CPython, the most popular Python runtime is written in human-readable C and Python code. This tutorial will walk you through the CPython source code. You’ll cover all the concepts behind the internals of CPython, how they work and visual explanations as you go. You’ll...
·Code Evaluator 也是我们常说 Python 虚拟机,负责执行这些字节码 运行环境 Runtime Env– 包括运行时的对象、基础类型结构、内存分配器和实时的运行状态信息。·Object 和 Type Structure 分别是程序在运行过程中生成的对象和Python中的自带内建对象,如 Int、Str、List 等·Memory Allocator 则负责申请创建对象需要的...
我们将在下一节中介绍CPython编译器和字节码。 对run_eval_code_obj()的调用是一个简单的包装函数,然后它会调用Python/eval.c文件中的PyEval_EvalCode()函数。PyEval_EvalCode()函数是CPython的主要评估循环,它会迭代每个字节码语句并在本地机器上执行它。
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# Old broken names (don't use in new code) BOM32_LE = BOM_UTF16_LE BOM32_BE = BOM_UTF16_BE BOM64_LE = BOM_UTF32_LE BOM64_BE = BOM_UTF32_BE### Codec base classes (defining the API)class CodecInfo(tuple): """Codec details when looking up the codec registry"""...