xdrlib3

0.1.1 verified Fri May 01 auth: no python

A Python library for encoding and decoding XDR (External Data Representation) data. It is a forked version of Python's standard library `xdrlib` (removed in Python 3.13), intended as a drop-in replacement. Current version 0.1.1, requires Python 3.7+.

pip install xdrlib3

Common errors

error ModuleNotFoundError: No module named 'xdrlib' ↓

cause Python 3.13 removed the deprecated xdrlib module.

fix

Install and use xdrlib3 instead: pip install xdrlib3 and change imports to from xdrlib3 import Packer.

error ImportError: cannot import name 'Packer' from 'xdrlib3' ↓

cause Typo or incorrect submodule path. The correct import is `from xdrlib3 import Packer`.

fix

Use from xdrlib3 import Packer (not from xdrlib3.xdrlib import Packer).

error TypeError: pack_int() missing 1 required positional argument: 'value' ↓

cause Forgetting to pass the value to pack methods.

fix

Call p.pack_int(42) with an argument.

Warnings

breaking xdrlib is removed from Python stdlib starting Python 3.13. Code using `from xdrlib import ...` will fail. Migrate to xdrlib3. ↓

fix Replace `from xdrlib import Packer, Unpacker` with `from xdrlib3 import Packer, Unpacker`.

gotcha The library is a fork of the old stdlib module. It is not maintained by Python core developers. Check for compatibility if using Python <3.7. ↓

fix Ensure Python >=3.7, as specified in requires_python.

gotcha The package name on PyPI is `xdrlib3`, but the import module is also `xdrlib3`. Do not confuse with `xdrlib` (the old stdlib) or other XDR libraries. ↓

fix Use `pip install xdrlib3` and `import xdrlib3`.

Imports

Packer
wrong
```
from xdrlib import Packer
```
correct
```
from xdrlib3 import Packer
```
xdrlib is removed in Python 3.13; xdrlib3 is the replacement.
Unpacker
wrong
```
from xdrlib import Unpacker
```
correct
```
from xdrlib3 import Unpacker
```
Same as above, xdrlib is gone in Python 3.13.

Quickstart

Basic usage: pack an integer, then unpack it.

from xdrlib3 import Packer, Unpacker

p = Packer()
p.pack_int(42)
data = p.get_buffer()

u = Unpacker(data)
print(u.unpack_int())  # 42