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visualizer.py
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import math
import os
import json
import glob
import shutil
import logging
import re as _re
from numbers import Number
from typing import Optional, Any
from flask import Flask, render_template, jsonify
from manual import create_manual_blueprint
logger = logging.getLogger(__name__)
app = Flask(__name__, template_folder="templates")
def find_latest_checkpoint(base_folder):
# Check whether the base folder is itself a checkpoint folder
if os.path.basename(base_folder).startswith("checkpoint_"):
return base_folder
checkpoint_folders = glob.glob("**/checkpoint_*", root_dir=base_folder, recursive=True)
if not checkpoint_folders:
logger.info(f"No checkpoint folders found in {base_folder}")
return None
checkpoint_folders = [os.path.join(base_folder, folder) for folder in checkpoint_folders]
checkpoint_folders.sort(key=lambda x: os.path.getmtime(x), reverse=True)
logger.debug(f"Found checkpoint folder: {checkpoint_folders[0]}")
return checkpoint_folders[0]
def load_evolution_data(checkpoint_folder):
meta_path = os.path.join(checkpoint_folder, "metadata.json")
programs_dir = os.path.join(checkpoint_folder, "programs")
if not os.path.exists(meta_path) or not os.path.exists(programs_dir):
logger.info(f"Missing metadata.json or programs dir in {checkpoint_folder}")
return {"archive": [], "nodes": [], "edges": [], "checkpoint_dir": checkpoint_folder}
with open(meta_path) as f:
meta = json.load(f)
nodes = []
id_to_program = {}
pids = set()
for island_idx, id_list in enumerate(meta.get("islands", [])):
for pid in id_list:
prog_path = os.path.join(programs_dir, f"{pid}.json")
# Keep track of PIDs and if one is double, append "-copyN" to the PID
if pid in pids:
base_pid = pid
# If base_pid already has a "-copyN" suffix, strip it
if "-copy" in base_pid:
base_pid = base_pid.rsplit("-copy", 1)[0]
# Find the next available copy number
copy_num = 1
while f"{base_pid}-copy{copy_num}" in pids:
copy_num += 1
pid = f"{base_pid}-copy{copy_num}"
pids.add(pid)
if os.path.exists(prog_path):
with open(prog_path) as pf:
prog = json.load(pf)
sanitize_program_for_visualization(prog)
prog["id"] = pid
prog["island"] = island_idx
nodes.append(prog)
id_to_program[pid] = prog
else:
logger.debug(f"Program file not found: {prog_path}")
edges = []
for prog in nodes:
parent_id = prog.get("parent_id")
if parent_id and parent_id in id_to_program:
edges.append({"source": parent_id, "target": prog["id"]})
logger.info(f"Loaded {len(nodes)} nodes and {len(edges)} edges from {checkpoint_folder}")
return {
"archive": meta.get("archive", []),
"nodes": nodes,
"edges": edges,
"checkpoint_dir": checkpoint_folder,
}
def sanitize_program_for_visualization(program: dict[str, Any]) -> None:
for k, v in program["metrics"].items():
if not check_json_float(v):
program["metrics"][k] = None
if "parent_metrics" in program["metadata"]:
for k, v in program["metadata"]["parent_metrics"].items():
if not check_json_float(v):
program["metadata"]["parent_metrics"][k] = None
def check_json_float(v: Optional[float]) -> bool:
return isinstance(v, Number) and not (math.isinf(v) or math.isnan(v))
@app.route("/")
def index():
return render_template("index.html", checkpoint_dir=checkpoint_dir)
checkpoint_dir = None # Global variable to store the checkpoint directory
@app.route("/api/data")
def data():
global checkpoint_dir
base_folder = os.environ.get("EVOLVE_OUTPUT", "examples/")
checkpoint_dir = find_latest_checkpoint(base_folder)
if not checkpoint_dir:
logger.info(f"No checkpoints found in {base_folder}")
return jsonify({"archive": [], "nodes": [], "edges": [], "checkpoint_dir": ""})
logger.info(f"Loading data from checkpoint: {checkpoint_dir}")
data = load_evolution_data(checkpoint_dir)
logger.debug(f"Data: {data}")
return jsonify(data)
@app.route("/program/<program_id>")
def program_page(program_id):
global checkpoint_dir
if checkpoint_dir is None:
return "No checkpoint loaded", 500
data = load_evolution_data(checkpoint_dir)
program_data = next((p for p in data["nodes"] if p["id"] == program_id), None)
program_data = {"code": "", "prompts": {}, **(program_data or {})}
artifacts_json = program_data.get("artifacts_json", None)
return render_template(
"program_page.html",
program_data=program_data,
checkpoint_dir=checkpoint_dir,
artifacts_json=artifacts_json,
)
def run_static_export(args):
output_dir = args.static_output
os.makedirs(output_dir, exist_ok=True)
# Load data and prepare JSON string
checkpoint_dir = find_latest_checkpoint(args.path)
if not checkpoint_dir:
raise RuntimeError(f"No checkpoint found in {args.path}")
data = load_evolution_data(checkpoint_dir)
logger.info(f"Exporting visualization for checkpoint: {checkpoint_dir}")
with app.app_context():
data_json = jsonify(data).get_data(as_text=True)
inlined = f"<script>window.STATIC_DATA = {data_json};</script>"
# Load index.html template
templates_dir = os.path.join(os.path.dirname(__file__), "templates")
template_path = os.path.join(templates_dir, "index.html")
with open(template_path, "r", encoding="utf-8") as f:
html = f.read()
# Insert static json data into the HTML
html = _re.sub(r"\{\{\s*url_for\('static', filename='([^']+)'\)\s*\}\}", r"static/\1", html)
script_tag_idx = html.find('<script type="module"')
if script_tag_idx != -1:
html = html[:script_tag_idx] + inlined + "\n" + html[script_tag_idx:]
else:
html = html.replace("</body>", inlined + "\n</body>")
with open(os.path.join(output_dir, "index.html"), "w", encoding="utf-8") as f:
f.write(html)
# Copy over static files
static_src = os.path.join(os.path.dirname(__file__), "static")
static_dst = os.path.join(output_dir, "static")
if os.path.exists(static_dst):
shutil.rmtree(static_dst)
shutil.copytree(static_src, static_dst)
logger.info(
f"Static export written to {output_dir}/\n"
f"Note: use a web server, not file://. "
f"Try: python3 -m http.server --directory {output_dir} 8080"
)
# Manual mode blueprint mounted at /manual
app.register_blueprint(create_manual_blueprint(lambda: os.environ.get("EVOLVE_OUTPUT", "examples/")))
if __name__ == "__main__":
import argparse
parser = argparse.ArgumentParser(description="OpenEvolve Evolution Visualizer")
parser.add_argument(
"--path",
type=str,
default="examples/",
help="Path to OpenEvolve run output directory (e.g. openevolve_output) or its checkpoints/checkpoint_*.",
)
parser.add_argument("--host", type=str, default="127.0.0.1")
parser.add_argument("--port", type=int, default=8080)
parser.add_argument(
"--log-level",
type=str,
default="INFO",
help="Logging level (DEBUG, INFO, WARNING, ERROR, CRITICAL)",
)
parser.add_argument(
"--static-output",
type=str,
default=None,
help="Produce a static HTML export in this directory and exit.",
)
args = parser.parse_args()
log_level = getattr(logging, args.log_level.upper(), logging.INFO)
logging.basicConfig(level=log_level, format="[%(asctime)s] %(levelname)s %(name)s: %(message)s")
logger.info(f"Current working directory: {os.getcwd()}")
if args.static_output:
run_static_export(args)
os.environ["EVOLVE_OUTPUT"] = args.path
logger.info(f"Starting server at http://{args.host}:{args.port} with log level {args.log_level.upper()}")
logger.info(f"Manual UI: http://{args.host}:{args.port}/manual")
app.run(host=args.host, port=args.port, debug=True)