给定一个python.pyc文件，是否有一个工具可以让我查看字节码？

Python模块由CPython解释器自动编译成.pyc文件。包含字节码的.pyc文件是二进制格式（封送代码？）。是否有一个GUI（或命令行）工具可以让我查看字节码？

有一个名为的可视化python反汇编程序

---

要以命令行方式执行此操作，您可以使用module

dis

（，），OP已经发现了这一点。

每个*.pyc文件都是包含以下内容的二进制文件：

• 一个四字节的幻数——它只是随着编组代码的每次更改而更改的字节数
• 四字节修改时间戳-是生成.pyc的源文件的Unix修改时间戳，以便在源更改时可以重新编译
• 由于Python3.3+版本，接下来的四个字节是将源文件的大小编码为long的字段
• 封送的代码对象

为什么不直接使用CPython的内置功能来完成这项任务呢

---

文件

view\u pyc\u file.py

import platform
import time
import sys
import binascii
import marshal
import dis
import struct


def view_pyc_file(path):
    """Read and display a content of the Python`s bytecode in a pyc-file."""

    file = open(path, 'rb')

    magic = file.read(4)
    timestamp = file.read(4)
    size = None

    if sys.version_info.major == 3 and sys.version_info.minor >= 3:
        size = file.read(4)
        size = struct.unpack('I', size)[0]

    code = marshal.load(file)

    magic = binascii.hexlify(magic).decode('utf-8')
    timestamp = time.asctime(time.localtime(struct.unpack('I', b'D\xa5\xc2X')[0]))

    dis.disassemble(code)

    print('-' * 80)
    print(
        'Python version: {}\nMagic code: {}\nTimestamp: {}\nSize: {}'
        .format(platform.python_version(), magic, timestamp, size)
    )

    file.close()


if __name__ == '__main__':
    view_pyc_file(sys.argv[1])

$ cat main.py
print("Never give up")

使用next CPython的版本进行测试：

• 2.7.9
• 3.4.2
• 3.5.2

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示范 文件的内容

main.py

import platform
import time
import sys
import binascii
import marshal
import dis
import struct


def view_pyc_file(path):
    """Read and display a content of the Python`s bytecode in a pyc-file."""

    file = open(path, 'rb')

    magic = file.read(4)
    timestamp = file.read(4)
    size = None

    if sys.version_info.major == 3 and sys.version_info.minor >= 3:
        size = file.read(4)
        size = struct.unpack('I', size)[0]

    code = marshal.load(file)

    magic = binascii.hexlify(magic).decode('utf-8')
    timestamp = time.asctime(time.localtime(struct.unpack('I', b'D\xa5\xc2X')[0]))

    dis.disassemble(code)

    print('-' * 80)
    print(
        'Python version: {}\nMagic code: {}\nTimestamp: {}\nSize: {}'
        .format(platform.python_version(), magic, timestamp, size)
    )

    file.close()


if __name__ == '__main__':
    view_pyc_file(sys.argv[1])

$ cat main.py
print("Never give up")

通过python2.7创建和读取pyc文件

setivolkylany$~/Downloads/temp/temp$ python2.7 -m py_compile main.py 
setivolkylany$~/Downloads/temp/temp$ python2.7 view_pyc_file.py ./main.pyc
  1           0 LOAD_CONST               0 ('Never give up')
              3 PRINT_ITEM          
              4 PRINT_NEWLINE       
              5 LOAD_CONST               1 (None)
              8 RETURN_VALUE        
--------------------------------------------------------------------------------
Python version: 2.7.9
Magic code: 03f30d0a
Timestamp: Fri Mar 10 15:08:20 2017
Size: None

通过python3.4创建和读取pyc文件

setivolkylany$~/Downloads/temp/temp$ python3.4 -m py_compile main.py 
setivolkylany$~/Downloads/temp/temp$ python3.4 view_pyc_file.py __pycache__/main.cpython-34.pyc 
  1           0 LOAD_NAME                0 (print)
              3 LOAD_CONST               0 ('Never give up')
              6 CALL_FUNCTION            1 (1 positional, 0 keyword pair)
              9 POP_TOP
             10 LOAD_CONST               1 (None)
             13 RETURN_VALUE
--------------------------------------------------------------------------------
Python version: 3.4.2
Magic code: ee0c0d0a
Timestamp: Fri Mar 10 15:08:20 2017
Size: 23

通过python3.5创建和读取pyc文件

setivolkylany$~/Downloads/temp/temp$ python3.5 -m py_compile main.py 
setivolkylany$~/Downloads/temp/temp$ python3.5 view_pyc_file.py __pycache__/main.cpython-35.pyc 
  1           0 LOAD_NAME                0 (print)
              3 LOAD_CONST               0 ('Never give up')
              6 CALL_FUNCTION            1 (1 positional, 0 keyword pair)
              9 POP_TOP
             10 LOAD_CONST               1 (None)
             13 RETURN_VALUE
--------------------------------------------------------------------------------
Python version: 3.5.2
Magic code: 160d0d0a
Timestamp: Fri Mar 10 15:08:20 2017
Size: 23

---

基于：

---

根据@Apteryx关于政治公众人物的注释扩展代码形式@PADYMKO：

def view_pyc_file(path):
    """Read and display a content of the Python`s bytecode in a pyc-file."""

    file = open(path, 'rb')

    magic = file.read(4)
    bit_field = None
    timestamp = None
    hashstr = None
    size = None

    if sys.version_info.major == 3 and sys.version_info.minor >=7:
        bit_field = int.from_bytes(file.read(4), byteorder=sys.byteorder)
        if 1 & bit_field == 1:
            hashstr = file.read(8)
        else:
            timestamp = file.read(4)
            size = file.read(4)
            size = struct.unpack('I', size)[0]
    elif sys.version_info.major == 3 and sys.version_info.minor >= 3:
        timestamp = file.read(4)
        size = file.read(4)
        size = struct.unpack('I', size)[0]
    else:
        timestamp = file.read(4)

    code = marshal.load(file)

    magic = binascii.hexlify(magic).decode('utf-8')
    timestamp = time.asctime(time.localtime(struct.unpack('I', b'D\xa5\xc2X')[0]))

    dis.disassemble(code)

    print('-' * 80)
    print(
        'Python version: {}\nMagic code: {}\nTimestamp: {}\nSize: {}\nHash: {}\nBitfield: {}'
        .format(platform.python_version(), magic, timestamp, size, hashstr, bit_field)
    )

    file.close()

---

您可以导入模块吗？这当然会执行它。你能澄清一下“查看字节码”吗？你想把它反编译成python代码（

.py

）还是想了解每个字节的含义？我想看看并研究字节码。我特别想了解模块全局对象是如何表示的。我在谷歌上搜索了一下，发现Python附带了一个名为“dis”的模块，我可以用它来表示。“导入dis；导入mymodule；dis.dis（模块）”。仍然想知道是否有一个GUI工具用于此。现在需要根据（Python 3.7）进行更新。我无法在评论中添加所需的修改，因此我将其添加为一个新的答案，但是@PADYMKO请随意使用它编辑您的答案。此项目现在已经相当过时，因此我不希望它能够阅读（完美地）最新Python版本生成的字节码。