sleepydatapeek is a Typer CLI for taking a quick look at tabular data files — print a tidy overview + schema + sample of any csv/parquet/json/pkl/xlsx (and metadata for pdf/images), or generate a shareable markdown + PDF report with charts.

Install

uv tool install sleepydatapeek     # or: pipx install sleepydatapeek

Native libraries: PDF reports use WeasyPrint, which needs pango/cairo/gdk-pixbuf. On macOS: brew install pango. On Debian/Ubuntu: apt install libpango-1.0-0 libpangocairo-1.0-0 libgdk-pixbuf-2.0-0. See the WeasyPrint docs for other platforms.

Configure

sleepydatapeek is a sleepy util and reads its settings from the shared ~/sleepyconfig/params.yml, using the datapeek_ key prefix. If the file is absent it writes only its own section (below) and says so; if a value it needs is missing it prints this snippet and asks you to verify your config.

# sleepydatapeek
datapeek_sample_size: 5              # rows shown in the sample table
datapeek_table_style: rounded_grid   # any tabulate style (simple, github, …)

Supported files

Commands

summary

Print a concise overview, schema, and sample of a data file. Table style + sample size come from your config.

$ sleepydatapeek summary sales.csv

╭─────────────┬───────────╮
│ File        │ sales.csv │
├─────────────┼───────────┤
│ File size   │ 1.02 MB   │
├─────────────┼───────────┤
│ Rows        │ 15230     │
├─────────────┼───────────┤
│ Columns     │ 6         │
├─────────────┼───────────┤
│ Index       │ index     │
├─────────────┼───────────┤
│ Index dtype │ int64     │
╰─────────────┴───────────╯

Schema
╭────────────┬─────────╮
│ order_id   │ int64   │
├────────────┼─────────┤
│ region     │ object  │
├────────────┼─────────┤
│ product    │ object  │
├────────────┼─────────┤
│ quantity   │ int64   │
├────────────┼─────────┤
│ revenue    │ float64 │
├────────────┼─────────┤
│ ordered_at │ object  │
╰────────────┴─────────╯

Sample (5 rows)
╭────┬────────────┬────────────┬───────────┬────────────┬───────────┬──────────────╮
│    │   order_id │ region     │ product   │   quantity │   revenue │ ordered_at   │
├────┼────────────┼────────────┼───────────┼────────────┼───────────┼──────────────┤
│  0 │       1001 │ us-west-2  │ Widget    │          3 │     59.97 │ 2026-01-04   │
├────┼────────────┼────────────┼───────────┼────────────┼───────────┼──────────────┤
│  1 │       1002 │ eu-west-1  │ Gizmo     │          1 │     12.5  │ 2026-01-04   │
├────┼────────────┼────────────┼───────────┼────────────┼───────────┼──────────────┤
│  2 │       1003 │ us-west-2  │ Sprocket  │          5 │    210    │ 2026-01-05   │
├────┼────────────┼────────────┼───────────┼────────────┼───────────┼──────────────┤
│  3 │       1004 │ ap-south-1 │ Widget    │          2 │     39.98 │ 2026-01-05   │
├────┼────────────┼────────────┼───────────┼────────────┼───────────┼──────────────┤
│  4 │       1005 │ eu-west-1  │ Cog       │          4 │      8    │ 2026-01-06   │
╰────┴────────────┴────────────┴───────────┴────────────┴───────────┴──────────────╯

Point it at a pdf or image instead and it prints that file's metadata (dimensions, page count, EXIF, …) in the same style. When a table is too wide, extra columns are elided with a ⚠️ too wide note.

report

Generate a markdown report + rendered PDF + summary charts for a data file. The PDF is copied to your clipboard (macOS) so it's ready to paste. --groupby <column> adds a grouped row-count table; the output folder defaults to <file>_report.

$ sleepydatapeek report sales.csv --groupby region

Report folder: /Users/dingus/work/sales_report
Relative path: sales_report
  markdown: sales.md
  pdf:      sales.pdf
PDF copied to clipboard — ready to paste.
Open with Zed: zed /Users/dingus/work/sales_report
Open with VS Code: code /Users/dingus/work/sales_report
Open PDF: open /Users/dingus/work/sales_report/sales.pdf
Reveal in Finder: open -R /Users/dingus/work/sales_report/sales.pdf

The folder gets the markdown, the PDF, and chart PNGs (null-counts and distinct-counts per column). report only accepts data files.

Development

uv venv
uv pip install -e ".[dev]"
uv run pytest          # or ./tools/test.sh

Documentation

• Specification — what the tool does
• Project outline — repository layout
• Test drive — setup, testing, and CLI usage
• Adding a command — how to extend the CLI
• Publishing — release to PyPI