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Jul 10, 2020 · The byte code instructions are created in the .pyc file. The .pyc file is not explicitly created as Python handles it internally but it can be viewed with the following command: -m and py_compile represent module and module name respectively. This module is responsible to generate .pyc file.
- How Python Works
- Inside The Python Virtual Machine
- Accessing and Understanding Python Bytecode
- Putting Bytecode to Use
- Further Reading
Python is often described as an interpreted language—one in which your source code is translated into native CPU instructions as the program runs—but this is only partially correct. Python, like many interpreted languages, actually compiles source code to a set of instructions for a virtual machine, and the Python interpreter is an implementation o...
CPython uses a stack-based virtual machine. That is, it's oriented entirely around stack data structures (where you can "push" an item onto the "top" of the structure, or "pop" an item off the "top"). CPython uses three types of stacks: 1. The call stack. This is the main structure of a running Python program. It has one item—a "frame"—for each cur...
If you want to play around with this, the dis module in the Python standard library is a huge help; the dis module provides a "disassembler" for Python bytecode, making it easy to get a human-readable version and look up the various bytecode instructions. The documentation for the dis modulegoes over its contents and provides a full list of bytecod...
Now that you've read this far, you might be thinking "OK, I guess that's cool, but what's the practical value of knowing this?" Setting aside curiosity for curiosity's sake, understanding Python bytecode is useful in a few ways. First, understanding Python's execution model helps you reason about your code. People like to joke about C being a kind ...
If you'd like to learn more about Python bytecode, the Python virtual machine, and how they work, I recommend these resources: 1. Inside the Python Virtual Machineby Obi Ike-Nwosu is a free online book that does a deep dive into the Python interpreter, explaining in detail how Python actually works. 2. A Python Interpreter Written in Pythonby Allis...
Mar 7, 2024 · Byte Code is automatically created in the same directory as .py file, when a module of python is imported for the first time, or when the source is more recent than the current compiled file. Next time, when the program is run, python interpreter use this file to skip the compilation step.
Feb 25, 2024 · Bytecode is the under-the-hood representation of your Python code, a middle-ground between the high-level Python you write and the binary machine code executed by the computer’s processor. When you run a Python script, your code is transformed into this low-level, platform-independent format, which the Python Virtual Machine (PVM) then executes.
Aug 10, 2023 · Step 1: The Python compiler reads a Python source code or instruction in the code editor. In this first stage, the execution of the code starts. Step 2: After writing Python code it is then saved as a .py file in our system. In this, there are instructions written by a Python script for the system.
Mar 5, 2020 · In Python, the bytecode is stored in a .pyc file. In Python 3, the bytecode files are stored in a folder named __pycache__. This folder is automatically created when you try to import another file that you created: import file_name. However, it will not be created if we don’t import another file in the source code.
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Jun 6, 2024 · Common Bytecode Instructions. Here are some of the most common bytecode instructions you’ll encounter, along with explanations and examples: LOAD_CONST: loads a constant value (like a number, string, or None) onto the top of the stack. For example, LOAD_CONST 1 ('Hello, ') loads the string “Hello, “ onto the stack.
