xdis

Python cross-version byte-code disassembler and marshal routines

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Project description

PyPI Installs Supported Python Versions

A Cross-Python bytecode disassembler, bytecode/wordcode and magic-number manipulation library/package.

Introduction

The Python dis module allows you to disassemble bytecode from the same version of Python that you are running on. But what about bytecode from different versions?

That’s what this package is for. It can “marshal load” Python bytecodes from different versions of Python. The command-line routine pydisasm will show disassembly output using Python 3.8 disassembly conventions.

Also, if you need to modify and write bytecode, the routines here can be of help. There are routines to pack and unpack the read-only tuples in Python’s Code type. For interoperability between Python 2 and 3 we provide our own versions of the Code type, and we provide routines to reduce the tedium in writing a bytecode file.

This package also has an extensive knowledge of Python bytecode magic numbers, including Pypy and others, and how to translate from sys.sys_info major, minor, and release numbers to the corresponding magic value.

So If you want to write a cross-version assembler, or a bytecode-level optimizer this package may also be useful. In addition to the kinds of instruction categorization that dis offers, we have additional categories for things that would be useful in such a bytecode optimizer.

The programs here accept bytecodes from Python version 1.0 to 3.8 or so. The code requires Python 2.4 or later and has been tested on Python running lots of Python versions.

To install versions for Python before 2.6 install via eggs or use the python-2.4 branch of git in github.

Installation

The standard Python routine:

$ pip install -e .
$ pip install -r requirements-dev.txt

A GNU makefile is also provided so make install (possibly as root or sudo) will do the steps above.

Testing

$ make check

A GNU makefile has been added to smooth over setting running the right command, and running tests from fastest to slowest.

If you have remake installed, you can see the list of all tasks including tests via remake --tasks.

Usage

Run

$ ./bin/pydisasm -h

for usage help.

As a drop-in replacement for dis

xdis also provides some support as a drop in replacement for the the Python library dis module. This is may be desirable when you want to use the improved API from Python 3.4 or later from an earlier Python version.

For example:

>>> # works in Python 2 and 3
>>> import xdis.std as dis
>>> [x.opname for x in dis.Bytecode('a = 10')]
['LOAD_CONST', 'STORE_NAME', 'LOAD_CONST', 'RETURN_VALUE']

There may some small differences in output produced for formatted disassembly or how we show compiler flags. We expect you’ll find the xdis output more informative though.

Project details

These details have not been verified by PyPI

Project links

Homepage

Release history Release notifications | RSS feed

6.1.2

Nov 9, 2024

6.1.1

Jul 21, 2024

6.1.0

Mar 16, 2024

6.0.5

Dec 23, 2022

6.0.4

May 19, 2022

6.0.3

Nov 6, 2021

6.0.2

Oct 29, 2021

6.0.1

Oct 23, 2021

6.0.0

Oct 16, 2021

5.0.13

Sep 25, 2021

5.0.12

Sep 12, 2021

5.0.11

Jul 6, 2021

5.0.10

Jun 16, 2021

5.0.9

Apr 17, 2021

5.0.8

Mar 14, 2021

This version

5.0.7

Jan 11, 2021

5.0.6

Dec 16, 2020

5.0.5

Oct 27, 2020

5.0.4

Aug 30, 2020

5.0.3

Jul 28, 2020

5.0.2

Jul 25, 2020

5.0.1

Jun 28, 2020

5.0.0

Jun 28, 2020

4.7.0

Jun 12, 2020

4.6.1

May 30, 2020

4.6.0

May 19, 2020

4.5.1

Apr 27, 2020

4.5.0

Apr 24, 2020

4.4.0

Apr 20, 2020

4.3.2

Apr 16, 2020

4.2.4

Mar 24, 2020

4.2.3

Mar 16, 2020

4.2.2

Dec 24, 2019

4.2.1

Dec 16, 2019

4.2.0

Dec 9, 2019

4.1.3

Nov 18, 2019

4.1.2

Oct 30, 2019

4.1.1

Oct 29, 2019

4.1.0

Oct 12, 2019

4.0.4

Oct 2, 2019

4.0.3

Jul 25, 2019

4.0.2

Jun 12, 2019

4.0.1

Apr 30, 2019

4.0.0

Apr 10, 2019

3.9.1

Mar 29, 2019

3.9.0

Mar 23, 2019

3.8.10

Mar 9, 2019

3.8.9

Dec 30, 2018

3.8.8

Oct 21, 2018

3.8.7

Aug 19, 2018

3.8.6

Jul 3, 2018

3.8.4

Jun 12, 2018

3.8.3

Jun 4, 2018

3.8.2

May 19, 2018

3.8.1

Apr 16, 2018

3.8.0

Apr 5, 2018

3.7.0

Mar 7, 2018

3.6.11

Feb 9, 2018

3.6.10

Feb 3, 2018

3.6.9

Jan 27, 2018

3.6.8

Jan 27, 2018

3.6.7

Jan 21, 2018

3.6.6

Jan 19, 2018

3.6.5

Jan 18, 2018

3.6.4

Jan 9, 2018

3.6.3

Dec 9, 2017

3.6.2

Dec 2, 2017

3.6.1

Nov 11, 2017

3.6.0

Sep 25, 2017

3.5.5

Aug 31, 2017

3.5.4

Aug 15, 2017

3.5.3

Aug 12, 2017

3.5.2

Aug 10, 2017

3.5.1

Jul 15, 2017

3.5.0

Jul 8, 2017

3.4.0

Jun 24, 2017

3.3.1

May 18, 2017

3.3.0

Mar 19, 2017

3.2.4

Dec 17, 2016

3.2.3

Nov 6, 2016

3.2.2

Nov 3, 2016

3.2.1

Oct 30, 2016

3.2.0

Oct 25, 2016

3.1.0

Oct 15, 2016

3.0.2

Oct 11, 2016

3.0.1

Oct 10, 2016

3.0.0

Oct 10, 2016

2.3.2

Oct 7, 2016

2.3.1

Sep 12, 2016

2.2.3

Aug 30, 2016

2.2.2

Aug 26, 2016

2.2.1

Aug 15, 2016

2.2.0

Aug 5, 2016

2.1.0

Aug 1, 2016

2.0.3

Jul 26, 2016

2.0.2

Jul 25, 2016

2.0.1

Jul 24, 2016

2.0.0

Jul 24, 2016

1.1.7

Jul 10, 2016

1.1.6

Jul 8, 2016

1.1.5

Jul 8, 2016

1.1.4

Jul 7, 2016

1.1.3

Jun 27, 2016

1.1.2

Jun 24, 2016

1.1.1

Jun 3, 2016

1.1.0

May 31, 2016

1.0.5

May 29, 2016

1.0.4

May 28, 2016

1.0.3

May 28, 2016

1.0.2

May 27, 2016

1.0.1

May 27, 2016

1.0.0

May 26, 2016

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