Refactor error handling and improve code readability in example scripts

Getting ready for setup.py

Author: DefinetlyNotAI

example/hwrng_example.py

@@ -14,13 +14,9 @@
 import hashlib
 import os
 import secrets
-import sys
 import time
 from concurrent.futures import ThreadPoolExecutor
 
-# Add the parent directory to sys.path to import pyCTools
-# This is necessary for local testing, but once pyCTools becomes a package, this can be removed.
-sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
 from pyCTools import MaxRNG
 
 
@@ -194,20 +190,20 @@ def threaded_rng_demo() -> None:
     def worker_function(thread_id, size):
         """Worker function that generates random bytes in a thread."""
         try:
-            start_time = time.time()
+            start_time_ = time.time()
             data = rng.maxrng_threadsafe(size)
-            elapsed = time.time() - start_time
+            elapsed = time.time() - start_time_
             return {
                 "thread_id": thread_id,
                 "data": data,
                 "size": size,
                 "time": elapsed,
                 "success": True
             }
-        except Exception as e:
+        except Exception as e_:
             return {
                 "thread_id": thread_id,
-                "error": str(e),
+                "error": str(e_),
                 "success": False
             }
 
@@ -411,15 +407,13 @@ def main() -> None:
     try:
         if os.path.exists("random_data.bin"):
             os.remove("random_data.bin")
-    except:
+    except Exception:
         pass
 
 
 if __name__ == "__main__":
     try:
-        import ctypes  # Import here for the error handling demo
-
         main()
-    except Exception as e:
-        print(f"\n❌ Unhandled exception: {e}")
+    except Exception as err:
+        print(f"\n❌ Unhandled exception: {err}")
         print("Demonstration terminated.")

example/process_inspect_example.py

@@ -8,16 +8,12 @@
 4. Interpreting and displaying the collected metrics
 5. Proper error handling and best practices
 """
-import os
-import sys
-import time
 import json
+import os
 import random
+import time
 from typing import Dict, Any
 
-# Add the parent directory to sys.path to import pyCTools
-# This is necessary for local testing, but once pyCTools becomes a package, this can be removed.
-sys.path.insert(0, os.path.abspath(os.path.join(os.path.dirname(__file__), "..")))
 from pyCTools import ProcessMetrics
 
 
@@ -41,6 +37,7 @@ def simulate_workload(intensity: int = 1) -> None:
 
     # Memory-intensive work
     print(f"Simulating memory-intensive work (level {intensity})...")
+    # noinspection PyUnusedLocal
     big_list = [random.random() for _ in range(intensity * 10**5)]
 
     # I/O-intensive work (file operations)
@@ -308,7 +305,6 @@ def demo_other_process_monitoring() -> None:
         import psutil
         processes_available = True
     except ImportError:
-        processes_available = False
         print("psutil not available. Install with 'pip install psutil' to see this demo")
         return