fix: Remove psutil dependency

src/ansys/fluent/core/fluent_connection.py

@@ -16,7 +16,6 @@
 import weakref
 
 import grpc
-import psutil
 
 import ansys.fluent.core as pyfluent
 from ansys.fluent.core.services import service_creator
@@ -292,6 +291,15 @@ def exit_server(self):
         self.scheme_eval.exec(("(exit-server)",))
 
 
+def _pid_exists(pid):
+    try:
+        os.kill(pid, 0)
+    except OSError:
+        return False
+    else:
+        return True
+
+
 class FluentConnection:
     """Encapsulates a Fluent connection.
 
@@ -601,8 +609,8 @@ def wait_process_finished(self, wait: float | int | bool = 60):
             )
         else:
             _response = timeout_loop(
-                lambda connection: psutil.pid_exists(connection.fluent_host_pid)
-                or psutil.pid_exists(connection.cortex_pid),
+                lambda connection: _pid_exists(connection.fluent_host_pid)
+                or _pid_exists(connection.cortex_pid),
                 wait,
                 args=(self.connection_properties,),
                 idle_period=0.5,

tests/test_fluent_session.py

@@ -3,12 +3,15 @@
 import threading
 import time
 
-import psutil
 import pytest
 
 import ansys.fluent.core as pyfluent
 from ansys.fluent.core.examples import download_file
-from ansys.fluent.core.fluent_connection import WaitTypeError, get_container
+from ansys.fluent.core.fluent_connection import (
+    WaitTypeError,
+    _pid_exists,
+    get_container,
+)
 from ansys.fluent.core.launcher.error_handler import IpPortNotProvided
 from ansys.fluent.core.utils.execution import asynchronous, timeout_loop
 from ansys.fluent.core.utils.fluent_version import FluentVersion
@@ -76,14 +79,14 @@ def f():
 
     timeout_loop(
         lambda: (inside_container and not get_container(cortex_host))
-        or (not inside_container and not psutil.pid_exists(fluent_host_pid)),
+        or (not inside_container and not _pid_exists(fluent_host_pid)),
         60,
     )
 
     if inside_container:
         assert not get_container(cortex_host)
     else:
-        assert not psutil.pid_exists(fluent_host_pid)
+        assert not _pid_exists(fluent_host_pid)
 
 
 def test_server_does_not_exit_when_session_goes_out_of_scope() -> None:
@@ -104,7 +107,7 @@ def f():
     else:
         from pathlib import Path
 
-        assert psutil.pid_exists(fluent_host_pid)
+        assert _pid_exists(fluent_host_pid)
         if os.name == "nt":
             cleanup_file_ext = "bat"
             cmd_list = []
@@ -243,7 +246,7 @@ def test_fluent_exit(monkeypatch: pytest.MonkeyPatch):
     solver.exit()
     assert timeout_loop(
         lambda: (inside_container and not get_container(cortex))
-        or (not inside_container and not psutil.pid_exists(cortex)),
+        or (not inside_container and not _pid_exists(cortex)),
         timeout=60,
         idle_period=1,
     )