90 lines
2.6 KiB
Python
90 lines
2.6 KiB
Python
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from pathlib import Path
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from typing import Any
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import aiofiles
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from bs4 import BeautifulSoup, NavigableString, Tag
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async def read_html(filename: Path) -> Tag | NavigableString | None:
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async with aiofiles.open(filename, "r") as f:
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html = await f.read()
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soup = BeautifulSoup(html, "html.parser")
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return soup.find("div", {"id": "premain"})
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async def parse_html(data: Tag | NavigableString | None) -> dict[Any, Any]:
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result = {"f_x": await parse_x_coefficents(data)}
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result["tables"] = await parse_tables(data)
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return await modify_data(result)
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async def parse_x_coefficents(data: Tag | NavigableString | None) -> list[Any]:
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if data is None:
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return []
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f_x = []
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b_el = data.find("b", string="Симплекс-метод")
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for _ in range(6):
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if b_el is not None:
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b_el = b_el.next_sibling
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if b_el is not None:
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f_x = ["".join(list(b_el.text.split()[-1])[:-1])]
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b_el = b_el.next_sibling
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while b_el is not None and b_el.text != " при следующих условиях-ограничений.":
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if b_el.text.endswith("x"):
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f_x.append((b_el.text[:-1]).replace("+", ""))
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b_el = b_el.next_sibling
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return f_x
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async def parse_tables(data: Tag | NavigableString | None) -> dict[int, list[Any]]:
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if data is None:
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return {}
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tables = data.find_all("table", {"class": "table-bordered"})
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result = {}
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table_num = 0
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for table_idx in range(len(tables)):
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marked_ceil = False
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tmp_table = []
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for rows in tables[table_idx].find_all("tr"):
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tmp_row = []
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for col in rows.find_all("td"):
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if col.has_attr("bgcolor"):
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marked_ceil = True
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tmp_row.append((col.text, col["bgcolor"]))
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else:
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tmp_row.append(col.text)
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tmp_table.append(tmp_row)
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if marked_ceil or table_idx == len(tables) - 1:
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result[table_num] = tmp_table
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table_num += 1
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return result
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async def modify_data(data: dict[Any, Any]) -> dict[Any, Any]:
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for table in data["tables"].values():
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first_row = ["", "C", "-"] + data["f_x"]
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for _ in range(len(table[0]) - len(first_row) + 1):
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first_row.append("0")
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table.insert(0, first_row)
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for i in range(1, len(table)):
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f_ceil = table[i][0]
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(
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table[i].insert(0, "")
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if not f_ceil.startswith("x")
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else table[i].insert(0, first_row[int(f_ceil[1:]) + 2])
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)
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return data
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