add python_exe App option; set client in python_runner; bump version

balsam/__init__.py

@@ -1,4 +1,4 @@
 from balsam.util import config_root_logger
 
-__version__ = "0.7.0.a3"
+__version__ = "0.7.0.a4"
 config_root_logger()

balsam/_api/app.py

@@ -207,6 +207,7 @@ class ModuleLoadError(Exception):
     _default_params: Dict[str, str]
     run: Optional[Callable[..., Any]] = None
     site: Union[int, str, "Site"]
+    python_exe: str = sys.executable
     _site_id: Optional[int] = None
     _client: Optional["RESTClient"] = None
     _app_type: AppType
@@ -251,9 +252,8 @@ def _render_pyrunner_command(self) -> str:
         job_payload = self.job._read_model.json()
         job_chunks = chunk_str(job_payload, self.ARG_CHUNK_SIZE)
 
-        python = sys.executable
         args = f"{app_id} {num_app_chunks} {' '.join(app_chunks)} {' '.join(job_chunks)}"
-        return f"{python} -m balsam.site.launcher.python_runner {args}"
+        return f"{self.python_exe} -m balsam.site.launcher.python_runner {args}"
 
     def _render_shell_command(self) -> str:
         """

balsam/site/launcher/python_runner.py

@@ -4,6 +4,7 @@
 
 from balsam._api.app import ApplicationDefinition, is_appdef
 from balsam._api.models import App, Job
+from balsam.config import SiteConfig
 from balsam.schemas import SerializeError, serialize, serialize_exception
 
 
@@ -62,9 +63,11 @@ def log_result(ret_val: Any) -> None:
 
 
 def main(app_id: int, num_app_chunks: int, chunks: List[str]) -> None:
+    site_config = SiteConfig()
     try:
         app_cls, job, params = unpack_chunks(app_id, num_app_chunks, chunks)
         app = app_cls(job)
+        app._set_client(site_config.client)
         if not callable(app.run):
             raise AttributeError(f"ApplicationDefinition {app_cls} does not have a run() function")
         return_value = app.run(**params)