shot-tabular

shot-tabular is a command-line tool for building per-shot tabular datasets from shot-based time series signals.

It loads one or more signals for each shot, interpolates them onto a shared time base, and writes one Parquet file per shot.

Features

• Load multiple signals per shot using uda or sal backend
• Interpolate each signal to a common time grid
• Process many shots in parallel with multiprocessing
• Save one output file per shot as Parquet (<output-folder>/<shot>.parquet)

Installation

This project uses pyproject.toml and requires Python 3.12+.

If you use uv:

uv sync

Or with pip:

python -m venv .venv
source .venv/bin/activate
pip install -e .

CLI

After installation, the command is:

st

You must specify shots in one of these ways:

• --shots 12345 12346
• --shot-file shots.csv (first column is used)
• --shot-min 12345 --shot-max 12360

You should also provide one or more -s signal mappings:

• -s <alias> <signal> to map a column name to a signal path
• -s <signal> to use the same text for alias and signal

Basic Example

st \
	--shots 12345 12346 \
	-s ip "AMC_PLASMA CURRENT" \
	-s ne "ANE_DENSITY" \
	--backend uda \
	--tmin 0.0 \
	--tmax 5.0 \
	--dt 0.01 \
	--method nearest \
	--output-folder output

Shot Range Example

st \
	--shot-min 12000 \
	--shot-max 12010 \
	-s ip \
	-o output

Output Format

Each successfully processed shot is written to:

• <output-folder>/<shot>.parquet

Each per-shot table includes:

• shot: shot number
• time: generated time base from tmin, tmax, and dt
• one column per signal alias

Columns are ordered as shot, time, then the successfully loaded signal columns.

Main Options

• --shots: explicit list of shot numbers
• --shot-file: CSV/text file of shot numbers (first column)
• --shot-min, --shot-max: inclusive shot range
• -s: signal mapping(s), repeatable
• --backend: uda or sal (default: uda)
• -o, --output-folder: output directory path (default: output)
• -n, --num-workers: worker process count (default: CPU count)
• --tmin: start time (default: 0.0)
• --tmax: end time (default: signal max time)
• --dt: time step (default: 0.01)
• --method: interpolation method (nearest, linear, cubic, zero, next, previous)

Development

Running the tests

Install dev dependencies (includes pytest) then run the suite:

uv sync --group dev
uv run pytest tests/ -v

Tests mock both uda and sal backends, so no VPN connection is required.

Linting

uv run ruff check shot_tabular/ tests/
uv run ty check shot_tabular/ tests/

Notes

• If an individual signal fails to load for a shot, processing continues and the error is printed.
• Output is currently Parquet-only.
• If all signals fail for a shot, no file is written for that shot.