PyREUser3 0.1.0

Pure Python tools for converting RE Engine .user.3 files to and from JSON.

PyREUser3

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PyREUser3 is a pure Python package for converting RE Engine .user.3 database files to JSON and packing compatible JSON back to .user.3.

Install it with:

pip install pyreuser3

Import it with the same normalized package name:

from pyreuser3 import REUser3Converter

What Is Included

• .user.3 -> JSON export.
• JSON -> .user.3 packing.
• A reusable Python API through REUser3Converter.
• CLI commands through pyreuser3.
• A local .user.3 export Web UI through pyreuser3-web.

This PyPI package intentionally does not include game resources, dumped game data, RE_RSZ templates, il2cpp_dump.json, .msg.23 conversion tools, or repository-specific helper scripts.

Requirements

• Python 3.9 or newer.
• A RE_RSZ schema JSON file for the target game/version.
• An il2cpp_dump.json file when exporting readable enum labels.
• One or more unpacked .user.3 files.

Command Line

Export .user.3 files to JSON:

pyreuser3 export \
  -i <input-user3-file-or-directory> \
  -s <RE_RSZ-schema.json> \
  -o <json-output-directory> \
  -p <il2cpp_dump.json>

Pack JSON back to .user.3:

pyreuser3 pack \
  -j <input-json-file-or-directory> \
  -s <RE_RSZ-schema.json> \
  -o <user3-output-directory> \
  -p <il2cpp_dump.json>

The -p/--il2cpp-dump-path option is required for export and optional for pack. Passing it during pack is recommended when enum names need to be resolved back to numeric values.

Start the local .user.3 export Web UI:

pyreuser3-web --port 8765

The Web UI only handles .user.3 export. It does not pack files and does not provide .msg.23 conversion.

Python API

from pyreuser3 import REUser3Converter

converter = REUser3Converter(
    schema_path="D:/schema/rsz_game.json",
    il2cpp_dump_path="D:/game/il2cpp_dump.json",
)

converter.export_file(
    "input/OtomonData.user.3",
    "json/OtomonData.user.3.json",
)

converter.pack_file(
    "json/OtomonData.user.3.json",
    "mod/OtomonData.user.3",
)

For stable patch-and-repack workflows, use patch_file() or parse_pack_file():

from pyreuser3 import REUser3Converter

converter = REUser3Converter(
    schema_path="D:/schema/rsz_game.json",
    il2cpp_dump_path="D:/game/il2cpp_dump.json",
)

def patch(data, source_path):
    # Modify the full instance-table JSON in place.
    return None

converter.patch_file(
    "input/example.user.3",
    "output/example.user.3",
    patch,
)

Build From Source

python -m pip install -U build twine
python -m build
python -m twine check dist/*

Upload to TestPyPI first:

python -m twine upload -r testpypi dist/*

Then upload the same checked distribution files to PyPI:

python -m twine upload dist/*

License

MIT License.