Game of Life source code

game-of-life-python/README.md

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+# `rplife`
+
+Conway's Game of Life in your terminal, to accompany the Real Python tutorial [Build Conway's Game of Life With Python](https://realpython.com/conway-game-of-life-python/).
+
+## Installation
+
+1. Create and activate a Python virtual environment:
+
+```sh
+$ python -m venv ./venv
+$ source venv/bin/activate
+(venv) $
+```
+
+2. Install `rplife` in editable mode:
+
+```sh
+(venv) $ cd rplife
+(venv) $ pip install -e .
+```
+
+## Execution
+
+To execute `rplife`, go ahead and run the following command:
+
+```sh
+(venv) $ rplife -a
+```
+
+## Author
+
+Real Python - Email: [email protected]
+
+## License
+
+Distributed under the MIT license. See `LICENSE` for more information.

game-of-life-python/source_code_final/pyproject.toml

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+[build-system]
+requires = ["setuptools>=64.0.0", "wheel"]
+build-backend = "setuptools.build_meta"
+
+[project]
+name = "rplife"
+dynamic = ["version"]
+description = "Conway's Game of Life in your terminal"
+readme = "README.md"
+authors = [{ name = "Real Python", email = "[email protected]" }]
+dependencies = [
+    'tomli; python_version < "3.11"',
+]
+
+[project.scripts]
+rplife = "rplife.__main__:main"
+
+[tool.setuptools.dynamic]
+version = {attr = "rplife.__version__"}

game-of-life-python/source_code_final/rplife/__init__.py

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+__version__ = "1.0.0"

game-of-life-python/source_code_final/rplife/__main__.py

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+import sys
+
+from rplife import patterns, views
+from rplife.cli import get_command_line_args
+
+
+def main():
+    args = get_command_line_args()
+    View = getattr(views, args.view)
+    if args.all:
+        for pattern in patterns.get_all_patterns():
+            _show_pattern(View, pattern, args)
+    else:
+        _show_pattern(View, patterns.get_pattern(name=args.pattern), args)
+
+
+def _show_pattern(View, pattern, args):
+    try:
+        View(pattern=pattern, gen=args.gen, frame_rate=args.fps).show()
+    except Exception as error:
+        print(error, file=sys.stderr)
+
+
+if __name__ == "__main__":
+    main()

game-of-life-python/source_code_final/rplife/cli.py

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+import argparse
+
+from rplife import __version__, patterns, views
+
+
+def get_command_line_args():
+    parser = argparse.ArgumentParser(
+        prog="rplife",
+        description="Conway's Game of Life in your terminal",
+    )
+    parser.add_argument(
+        "--version", action="version", version=f"%(prog)s v{__version__}"
+    )
+    parser.add_argument(
+        "-p",
+        "--pattern",
+        choices=[pat.name for pat in patterns.get_all_patterns()],
+        default="Blinker",
+        help="take a pattern for the Game of Life (default: %(default)s)",
+    )
+    parser.add_argument(
+        "-a",
+        "--all",
+        action="store_true",
+        help="show all available patterns in a sequence",
+    )
+    parser.add_argument(
+        "-v",
+        "--view",
+        choices=views.__all__,
+        default="CursesView",
+        help="display the life grid in a specific view (default: %(default)s)",
+    )
+    parser.add_argument(
+        "-g",
+        "--gen",
+        metavar="NUM_GENERATIONS",
+        type=int,
+        default=10,
+        help="number of generations (default: %(default)s)",
+    )
+    parser.add_argument(
+        "-f",
+        "--fps",
+        metavar="FRAMES_PER_SECOND",
+        type=int,
+        default=7,
+        help="frames per second (default: %(default)s)",
+    )
+    return parser.parse_args()

game-of-life-python/source_code_final/rplife/grid.py

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+import collections
+
+ALIVE = "♥"
+DEAD = "‧"
+
+
+class LifeGrid:
+    def __init__(self, pattern):
+        self.pattern = pattern
+
+    def evolve(self):
+        neighbors = (
+            (-1, -1),  # Above left
+            (-1, 0),  # Above
+            (-1, 1),  # Above right
+            (0, -1),  # Left
+            (0, 1),  # Right
+            (1, -1),  # Below left
+            (1, 0),  # Below
+            (1, 1),  # Below right
+        )
+        num_neighbors = collections.defaultdict(int)
+        for row, col in self.pattern.alive_cells:
+            for drow, dcol in neighbors:
+                num_neighbors[(row + drow, col + dcol)] += 1
+
+        stay_alive = {
+            cell for cell, num in num_neighbors.items() if num in {2, 3}
+        } & self.pattern.alive_cells
+        come_alive = {
+            cell for cell, num in num_neighbors.items() if num == 3
+        } - self.pattern.alive_cells
+
+        self.pattern.alive_cells = stay_alive | come_alive
+
+    def as_string(self, bbox):
+        start_col, start_row, end_col, end_row = bbox
+        display = [self.pattern.name.center(2 * (end_col - start_col))]
+        for row in range(start_row, end_row):
+            display_row = [
+                ALIVE if (row, col) in self.pattern.alive_cells else DEAD
+                for col in range(start_col, end_col)
+            ]
+            display.append(" ".join(display_row))
+        return "\n ".join(display)
+
+    def __str__(self):
+        return (
+            f"{self.pattern.name}:\n"
+            f"Alive cells -> {sorted(self.pattern.alive_cells)}"
+        )

game-of-life-python/source_code_final/rplife/patterns.py

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+from dataclasses import dataclass
+from pathlib import Path
+
+try:
+    import tomllib
+except ImportError:
+    import tomli as tomllib
+
+PATTERNS_FILE = Path(__file__).parent / "patterns.toml"
+
+
+@dataclass
+class Pattern:
+    name: str
+    alive_cells: set[tuple[int, int]]
+
+    @classmethod
+    def from_toml(cls, name, toml_data):
+        return cls(
+            name,
+            alive_cells={tuple(cell) for cell in toml_data["alive_cells"]},
+        )
+
+
+def get_pattern(name, filename=PATTERNS_FILE):
+    data = tomllib.loads(filename.read_text(encoding="utf-8"))
+    return Pattern.from_toml(name, toml_data=data[name])
+
+
+def get_all_patterns(filename=PATTERNS_FILE):
+    data = tomllib.loads(filename.read_text(encoding="utf-8"))
+    return [
+        Pattern.from_toml(name, toml_data) for name, toml_data in data.items()
+    ]

game-of-life-python/source_code_final/rplife/patterns.toml

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+["Blinker"]
+alive_cells = [[2, 1], [2, 2], [2, 3]]
+
+["Toad"]
+alive_cells = [[2, 2], [2, 3], [2, 4], [3, 1], [3, 2], [3, 3]]
+
+["Beacon"]
+alive_cells = [[1, 1], [1, 2], [2, 1], [4, 3], [4, 4], [3, 4]]
+
+["Pulsar"]
+alive_cells = [
+    [2, 4],
+    [2, 5],
+    [2, 6],
+    [2, 10],
+    [2, 11],
+    [2, 12],
+    [4, 2],
+    [5, 2],
+    [6, 2],
+    [4, 7],
+    [5, 7],
+    [6, 7],
+    [4, 9],
+    [5, 9],
+    [6, 9],
+    [4, 14],
+    [5, 14],
+    [6, 14],
+    [7, 4],
+    [7, 5],
+    [7, 6],
+    [7, 10],
+    [7, 11],
+    [7, 12],
+    [9, 4],
+    [9, 5],
+    [9, 6],
+    [9, 10],
+    [9, 11],
+    [9, 12],
+    [10, 2],
+    [11, 2],
+    [12, 2],
+    [10, 7],
+    [11, 7],
+    [12, 7],
+    [10, 9],
+    [11, 9],
+    [12, 9],
+    [10, 14],
+    [11, 14],
+    [12, 14],
+    [14, 4],
+    [14, 5],
+    [14, 6],
+    [14, 10],
+    [14, 11],
+    [14, 12]
+]
+
+["Penta Decathlon"]
+alive_cells = [
+    [5, 4],
+    [6, 4],
+    [7, 4],
+    [8, 4],
+    [9, 4],
+    [10, 4],
+    [11, 4],
+    [12, 4],
+    [5, 5],
+    [7, 5],
+    [8, 5],
+    [9, 5],
+    [10, 5],
+    [12, 5],
+    [5, 6],
+    [6, 6],
+    [7, 6],
+    [8, 6],
+    [9, 6],
+    [10, 6],
+    [11, 6],
+    [12, 6]
+]
+
+["Glider"]
+alive_cells = [[0, 2], [1, 0], [1, 2], [2, 1], [2, 2]]
+
+["Glider Gun"]
+alive_cells = [
+    [0, 24],
+    [1, 22],
+    [1, 24],
+    [2, 12],
+    [2, 13],
+    [2, 20],
+    [2, 21],
+    [2, 34],
+    [2, 35],
+    [3, 11],
+    [3, 15],
+    [3, 20],
+    [3, 21],
+    [3, 34],
+    [3, 35],
+    [4, 0],
+    [4, 1],
+    [4, 10],
+    [4, 16],
+    [4, 20],
+    [4, 21],
+    [5, 0],
+    [5, 1],
+    [5, 10],
+    [5, 14],
+    [5, 16],
+    [5, 17],
+    [5, 22],
+    [5, 24],
+    [6, 10],
+    [6, 16],
+    [6, 24],
+    [7, 11],
+    [7, 15],
+    [8, 12],
+    [8, 13]
+]
+
+["Bunnies"]
+alive_cells = [
+    [10, 10],
+    [10, 16],
+    [11, 12],
+    [11, 16],
+    [12, 12],
+    [12, 15],
+    [12, 17],
+    [13, 11],
+    [13, 13]
+]