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356 lines
10 KiB
Python
356 lines
10 KiB
Python
"""Anki flashcard generator for Polish rivers.
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Generates Anki-compatible flashcard decks with maps showing rivers
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highlighted on a Poland map.
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"""
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from __future__ import annotations
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import argparse
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import hashlib
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from io import BytesIO
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import multiprocessing as mp
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from pathlib import Path
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import random
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import sys
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import tempfile
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from typing import TYPE_CHECKING
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import genanki
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import geopandas as gpd
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import matplotlib as mpl
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mpl.use("Agg") # Non-interactive backend for multiprocessing
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import matplotlib.pyplot as plt
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sys.path.insert(0, str(Path(__file__).parent.parent))
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from geo_data import get_poland_boundary, get_polish_rivers
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if TYPE_CHECKING:
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from collections.abc import Sequence
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from matplotlib.figure import Figure
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RIVER_COLOR = "#2980B9" # Dark blue for rivers
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NEIGHBOR_COLOR = "#EAECEE" # Light gray for neighboring areas
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def create_river_map(
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river_gdf: gpd.GeoDataFrame,
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poland_boundary: gpd.GeoDataFrame,
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) -> Figure:
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"""Create a map showing Poland with one river highlighted.
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Rivers that extend beyond Poland show an extended view.
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"""
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fig, ax = plt.subplots(figsize=(10, 12))
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ax.set_aspect("equal")
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ax.axis("off")
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fig.patch.set_alpha(0)
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ax.patch.set_alpha(0)
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# Get Poland bounds
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poland_bounds = poland_boundary.total_bounds
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river_bounds = river_gdf.total_bounds
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# Check if river extends beyond Poland
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extends_beyond = (
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river_bounds[0] < poland_bounds[0]
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or river_bounds[1] < poland_bounds[1]
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or river_bounds[2] > poland_bounds[2]
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or river_bounds[3] > poland_bounds[3]
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)
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if extends_beyond:
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# Calculate extended bounds with some padding
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min_x = min(poland_bounds[0], river_bounds[0]) - 0.2
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min_y = min(poland_bounds[1], river_bounds[1]) - 0.2
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max_x = max(poland_bounds[2], river_bounds[2]) + 0.2
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max_y = max(poland_bounds[3], river_bounds[3]) + 0.2
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# Draw background for extended area (neighboring countries)
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ax.fill(
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[min_x, max_x, max_x, min_x, min_x],
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[min_y, min_y, max_y, max_y, min_y],
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color=NEIGHBOR_COLOR,
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alpha=0.3,
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)
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# Plot Poland as a plain gray shape
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poland_boundary.plot(ax=ax, color="#D5D8DC", alpha=0.6)
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poland_boundary.boundary.plot(ax=ax, color="#2C3E50", linewidth=1)
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# Plot the river
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river_gdf.plot(ax=ax, color=RIVER_COLOR, linewidth=3, alpha=0.9)
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if extends_beyond:
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ax.set_xlim(min_x, max_x)
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ax.set_ylim(min_y, max_y)
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else:
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# Set bounds to Poland
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ax.set_xlim(poland_bounds[0], poland_bounds[2])
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ax.set_ylim(poland_bounds[1], poland_bounds[3])
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return fig
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def generate_river_image_bytes(
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river_gdf: gpd.GeoDataFrame,
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poland_boundary: gpd.GeoDataFrame,
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) -> bytes:
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"""Generate a river map image as bytes."""
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fig = create_river_map(river_gdf, poland_boundary)
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buf = BytesIO()
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fig.savefig(buf, format="png", bbox_inches="tight", dpi=150)
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plt.close(fig)
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buf.seek(0)
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return buf.read()
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# Global variables for multiprocessing (set via initializer)
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_mp_poland_boundary: gpd.GeoDataFrame | None = None
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def _init_worker(poland_geojson: str) -> None:
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"""Initialize worker process with shared data."""
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global _mp_poland_boundary # noqa: PLW0603
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_mp_poland_boundary = gpd.read_file(poland_geojson)
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def _render_single_river(args: tuple[str, str]) -> tuple[str, bytes]:
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"""Render a single river image (worker function).
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Args:
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args: Tuple of (river_name, river_geojson_str).
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Returns:
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Tuple of (river_name, image_bytes).
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"""
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river_name, river_geojson = args
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river_gdf = gpd.read_file(river_geojson)
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assert _mp_poland_boundary is not None # noqa: S101
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image_data = generate_river_image_bytes(river_gdf, _mp_poland_boundary)
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return river_name, image_data
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def generate_anki_package(
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rivers: gpd.GeoDataFrame,
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poland_boundary: gpd.GeoDataFrame,
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deck_name: str = "Polish Rivers",
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) -> genanki.Package:
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"""Generate Anki package for Polish rivers."""
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model_id_hash = hashlib.md5(f"polish_rivers_{deck_name}".encode()) # noqa: S324
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model_id = int(model_id_hash.hexdigest()[:8], 16)
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card_css = """
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.card {
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font-family: Arial, sans-serif;
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font-size: 24px;
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text-align: center;
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color: #333;
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background-color: #fff;
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}
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.card.night_mode {
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color: #eee;
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background-color: #2f2f2f;
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}
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.map-container {
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display: flex;
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justify-content: center;
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align-items: center;
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min-height: 80vh;
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}
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.map-container img {
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max-width: 100%;
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max-height: 80vh;
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object-fit: contain;
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}
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.answer-text {
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font-size: 32px;
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font-weight: bold;
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margin-top: 20px;
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color: #2C3E50;
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}
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.card.night_mode .answer-text {
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color: #ECF0F1;
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}
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.info-text {
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font-size: 18px;
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color: #7F8C8D;
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margin-top: 10px;
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}
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.card.night_mode .info-text {
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color: #BDC3C7;
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}
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"""
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my_model = genanki.Model(
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model_id,
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"Polish River Model",
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fields=[
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{"name": "RiverMap"},
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{"name": "RiverName"},
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{"name": "Length"},
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],
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templates=[
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{
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"name": "Card 1",
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"qfmt": '<div class="map-container">{{RiverMap}}</div>',
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"afmt": '<div class="map-container">{{RiverMap}}</div>'
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'<hr id="answer">'
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'<div class="answer-text">{{RiverName}}</div>'
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'<div class="info-text">~{{Length}} km w Polsce</div>',
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},
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],
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css=card_css,
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)
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deck_id = random.randrange(1 << 30, 1 << 31) # noqa: S311
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my_deck = genanki.Deck(deck_id, deck_name)
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media_files = []
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# Prepare data for parallel processing
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with tempfile.NamedTemporaryFile(suffix=".geojson", delete=False) as f:
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poland_boundary.to_file(f.name, driver="GeoJSON")
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poland_geojson_path = f.name
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# Prepare work items: (river_name, river_geojson_str)
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work_items: list[tuple[str, str]] = []
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for _, row in rivers.iterrows():
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river_gdf = gpd.GeoDataFrame([row], crs=rivers.crs)
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river_geojson = river_gdf.to_json()
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work_items.append((row["name"], river_geojson))
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# Use multiprocessing for parallel rendering
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num_workers = min(mp.cpu_count(), 8)
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sys.stdout.write(
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f"Rendering {len(work_items)} images using {num_workers} workers...\n"
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)
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results: dict[str, bytes] = {}
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with mp.Pool(
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num_workers,
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initializer=_init_worker,
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initargs=(poland_geojson_path,),
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) as pool:
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for i, (river_name, image_data) in enumerate(
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pool.imap_unordered(_render_single_river, work_items)
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):
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results[river_name] = image_data
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if (i + 1) % 50 == 0:
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sys.stdout.write(f" Rendered {i + 1}/{len(work_items)}...\n")
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# Clean up temp file
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Path(poland_geojson_path).unlink(missing_ok=True)
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# Create notes from results
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for _, row in rivers.iterrows():
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river_name = row["name"]
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length_km = round(row["length_km"]) if "length_km" in row else 0
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image_data = results[river_name]
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filename = f"river_{river_name.replace(' ', '_').replace('/', '_')}.png"
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note = genanki.Note(
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model=my_model,
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fields=[f'<img src="{filename}">', river_name, str(length_km)],
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tags=["geography", "poland", "rivers", "water"],
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)
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my_deck.add_note(note)
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temp_path = Path(f"/tmp/{filename}") # noqa: S108
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temp_path.write_bytes(image_data)
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media_files.append(str(temp_path))
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package = genanki.Package(my_deck)
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package.media_files = media_files
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return package
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def main(argv: Sequence[str] | None = None) -> int:
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"""Main entry point."""
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parser = argparse.ArgumentParser(
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description="Generate Anki flashcards for Polish rivers.",
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)
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parser.add_argument(
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"--output",
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"-o",
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type=str,
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default=None,
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help="Output file path (default: polish_rivers.apkg)",
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)
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parser.add_argument(
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"--deck-name",
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"-d",
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type=str,
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default="Polish Rivers",
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help="Name for the Anki deck",
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)
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parser.add_argument(
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"--preview",
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"-p",
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type=str,
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default=None,
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help="Export preview images to specified directory",
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)
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parser.add_argument(
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"--preview-count",
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type=int,
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default=5,
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help="Number of preview images to export (default: 5)",
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)
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args = parser.parse_args(argv)
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output_path = Path(args.output) if args.output else Path("polish_rivers.apkg")
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try:
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sys.stdout.write("Loading rivers data...\n")
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rivers = get_polish_rivers()
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poland_boundary = get_poland_boundary()
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num_rivers = len(rivers)
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sys.stdout.write(f"Found {num_rivers} rivers.\n")
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sys.stdout.write("Generating flashcards...\n")
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package = generate_anki_package(rivers, poland_boundary, args.deck_name)
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package.write_to_file(str(output_path))
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# Export preview images if requested
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if args.preview:
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preview_dir = Path(args.preview)
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preview_dir.mkdir(parents=True, exist_ok=True)
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preview_rivers = list(rivers.iterrows())[: args.preview_count]
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sys.stdout.write(
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f"Exporting {len(preview_rivers)} preview images "
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f"to {preview_dir}...\n"
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)
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for _, row in preview_rivers:
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river_name = row["name"]
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river_gdf = gpd.GeoDataFrame([row], crs=rivers.crs)
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image_data = generate_river_image_bytes(river_gdf, poland_boundary)
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safe_name = river_name.replace(" ", "_").replace("/", "_")
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preview_path = preview_dir / f"{safe_name}.png"
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preview_path.write_bytes(image_data)
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sys.stdout.write(f" Saved: {preview_path.name}\n")
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sys.stdout.write("\n")
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sys.stdout.write("=" * 60 + "\n")
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sys.stdout.write("FLASHCARD GENERATION COMPLETE\n")
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sys.stdout.write("=" * 60 + "\n")
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sys.stdout.write(f"Rivers: {num_rivers}\n")
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sys.stdout.write(f"Output file: {output_path.absolute()}\n")
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if args.preview:
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sys.stdout.write(f"Preview images: {args.preview}\n")
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except (OSError, ValueError, RuntimeError) as e:
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sys.stderr.write(f"Error: {e}\n")
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return 1
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else:
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return 0
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if __name__ == "__main__":
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sys.exit(main())
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