fix: define the User-Agent as a single module variable

Drops the env.py indirection and the python-version suffix: one
USER_AGENT constant in client.py, reused by async_client.py.

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

Author: VinciGit00

src/scrapegraph_py/async_client.py

@@ -11,7 +11,8 @@
 import httpx
 from pydantic import BaseModel, TypeAdapter
 
-from .env import USER_AGENT, env
+from .client import USER_AGENT
+from .env import env
 from .schemas import (
     ApiResult,
     CrawlPagesQuery,

src/scrapegraph_py/client.py

@@ -6,12 +6,13 @@
 import sys
 import time
 from datetime import datetime
+from importlib import metadata
 from typing import Literal
 
 import httpx
 from pydantic import BaseModel, TypeAdapter
 
-from .env import USER_AGENT, env
+from .env import env
 from .schemas import (
     ApiResult,
     CrawlPagesQuery,
@@ -44,6 +45,7 @@
 )
 
 _SERVER_TIMING_RE = re.compile(r"dur=(\d+(?:\.\d+)?)")
+USER_AGENT = f"scrapegraph-py/{metadata.version('scrapegraph-py')}"
 
 
 def _debug(label: str, data: object = None) -> None:

src/scrapegraph_py/env.py

@@ -1,15 +1,6 @@
 from __future__ import annotations
 
 import os
-import platform
-from importlib.metadata import PackageNotFoundError, version
-
-try:
-    __version__ = version("scrapegraph-py")
-except PackageNotFoundError:  # local checkout without an installed distribution
-    __version__ = "unknown"
-
-USER_AGENT = f"scrapegraph-py/{__version__} python/{platform.python_version()}"
 
 
 class Env:

tests/test_client.py

@@ -15,7 +15,7 @@
     ScrapeGraphAI,
     ScreenshotFormatConfig,
 )
-from scrapegraph_py.env import USER_AGENT
+from scrapegraph_py.client import USER_AGENT
 
 API_KEY = "test-sgai-key"
 BASE_URL = "https://api.scrapegraphai.com/v2"