sveden-table-matrixizer 1.0.0

Module for convert tables from HTML-pages (/sveden) to matrix of bs4 tags

sveden-table-matrixizer

Extract and matrixize HTML tables from Russian educational organization pages (/sveden) with full colspan/rowspan support.

sveden-table-matrixizer is an asynchronous Python library that parses tables found on /sveden (сведения об образовательной организации) pages, expands colspan and rowspan attributes into clean two-dimensional matrices, and returns structured head and body cell grids. It gives you full control over edge cases via configurable callbacks.

Features

• Async page fetching using aiohttp.
• Full colspan/rowspan expansion – cells spanning multiple rows and/or columns are duplicated into the matrix.
• Separate head and body matrix extraction – each table yields a head matrix (from <thead>) and a body matrix (from <tbody>).
• Customizable error handling – replace default reactions to missing headers, missing bodies, or multiple <thead>/ <tbody> elements.
• Lightweight – only depends on aiohttp and beautifulsoup4.
• Works with any HTML – designed for /sveden, but usable on any page containing <table> elements.

Installation

pip install sveden-table-matrixizer

Quick Start

import asyncio
from sveden_table_matrixizer import matrixize_tables_from_page


async def main():
    url = "https://example.edu/sveden/"
    tables = await matrixize_tables_from_page(url)

    for i, table in enumerate(tables):
        print(f"Table {i + 1}:")
        print("  Head rows:", len(table.head))
        print("  Body rows:", len(table.body))
        # Access cells as list[list[bs4.Tag]]


asyncio.run(main())

Each MatrixizedTable contains:

• head: list[list[Tag]] – rows of header cells (each row is a list of bs4.Tag).
• body: list[list[Tag]] – rows of body cells.

Handling Edge Cases

By default, the extractor raises exceptions when a table lacks a header or body, or contains more than one <thead> / <tbody>. You can override this behavior with ExtractorOptions.

from sveden_table_matrixizer import matrixize_tables_from_page, ExtractorOptions
from sveden_table_matrixizer.def_funcs import MatrixizedTable


def handle_missing_header(table_tag, collected_tables):
    print(f"Skipping table without <thead>: {table_tag.get('id', 'no id')}")


opts = ExtractorOptions(
    on_table_no_header=handle_missing_header,
    # other callbacks can be set similarly
)

tables = await matrixize_tables_from_page(url, options=opts)

You can also supply async callbacks – the library automatically detects and awaits them.

API Reference

matrixize_tables_from_page(url, *, options=None)

• Parameters:
  • url (str) – URL of the page to scrape.
  • options (ExtractorOptions, optional) – configuration callbacks.
• Returns: list[MatrixizedTable] – extracted and matrixized tables.

ExtractorOptions

A frozen dataclass with the following fields (all optional):

Field	Type	Default	Description
on_table_no_header	Callable[[Tag, Sequence[MatrixizedTable]], Any]	no‑op	Called when a table has no <thead>
on_table_no_body	Callable[[Tag, Sequence[MatrixizedTable]], Any]	no‑op	Called when a table has no <tbody>
on_multiply_table_headers	Callable[[Sequence[Tag]], Tag | Never]	raises MultiplyTableHeaderError	Called when more than one <thead> is found; must return a single <thead> element.
on_multiply_table_bodies	Callable[[Sequence[Tag]], Tag | Never]	raises MultiplyTableBodyError	Called when more than one <tbody> is found; must return a single <tbody> element.

MatrixizedTable

@dataclass(frozen=True, kw_only=True)
class MatrixizedTable:
    head: list[list[Tag]]  # matrix of <th> tags
    body: list[list[Tag]]  # matrix of <td> tags

Exceptions

• NoTableHeaderError – raised when options.on_table_no_header is not overridden.
• NoTableBodyError – raised when options.on_table_no_body is not overridden.
• MultiplyTableHeaderError – default reaction to multiple <thead> elements.
• MultiplyTableBodyError – default reaction to multiple <tbody> elements.

All exceptions are exported from sveden_table_matrixizer.errors.

How It Works

1. The page is fetched with aiohttp and parsed by BeautifulSoup.
2. All <table> tags are collected.
3. For each table:
   • The <thead> is located; if missing or duplicate, the appropriate callback is invoked.
   • The <tbody> is located similarly.
   • Header rows are expanded: each <th> with colspan/rowspan is replicated into the correct cells of a 2D list.
   • The same expansion is applied to body rows using <td> elements.
4. A MatrixizedTable(head=..., body=...) is created and added to the result list.

Dependencies

• Python ≥ 3.11
• aiohttp
• beautifulsoup4

License

This project is licensed under the MIT License – see the source repository for details.