improve and move isfloat(num)

README-DE.md

@@ -11,7 +11,7 @@ Die Diskussion findet im [Forum](https://www.akkudoktor.net/forum/diy-energie-op
 Gute Install Anleitung:
 https://meintechblog.de/2024/09/05/andreas-schmitz-joerg-installiert-mein-energieoptimierungssystem/
 
-Das Projekt erfordert Python 3.8 oder neuer.
+Das Projekt erfordert Python 3.10 oder neuer.
 
 ### Schnellanleitung
 

README.md

@@ -11,7 +11,7 @@ See [CONTRIBUTING.md](CONTRIBUTING.md).
 Good installation guide:
 https://meintechblog.de/2024/09/05/andreas-schmitz-joerg-installiert-mein-energieoptimierungssystem/
 
-The project requires Python 3.8 or newer.
+The project requires Python 3.10 or newer.
 
 ### Quick Start Guide
 

src/akkudoktoreos/class_optimize.py

@@ -12,15 +12,6 @@
 from akkudoktoreos.visualize import visualisiere_ergebnisse
 
 
-def isfloat(num: Any) -> bool:
-    """Check if a given input can be converted to float."""
-    try:
-        float(num)
-        return True
-    except ValueError:
-        return False
-
-
 class optimization_problem:
     def __init__(
         self,

src/akkudoktoreosserver/flask_server.py

@@ -2,6 +2,7 @@
 
 import os
 from datetime import datetime
+from typing import Any, TypeGuard
 
 import matplotlib
 
@@ -14,7 +15,7 @@
 from akkudoktoreos.class_load import LoadForecast
 from akkudoktoreos.class_load_container import Gesamtlast
 from akkudoktoreos.class_load_corrector import LoadPredictionAdjuster
-from akkudoktoreos.class_optimize import isfloat, optimization_problem
+from akkudoktoreos.class_optimize import optimization_problem
 from akkudoktoreos.class_pv_forecast import PVForecast
 from akkudoktoreos.class_strompreis import HourlyElectricityPriceForecast
 from akkudoktoreos.config import get_start_enddate, optimization_hours, prediction_hours
@@ -26,6 +27,25 @@
 )
 
 
+def isfloat(num: Any) -> TypeGuard[float]:
+    """Check if a given input can be converted to float."""
+    if num is None:
+        return False
+
+    if isinstance(num, str):
+        num = num.strip()  # Strip any surrounding whitespace
+
+    try:
+        float_value = float(num)
+        return not (
+            float_value == float("inf")
+            or float_value == float("-inf")
+            or float_value != float_value
+        )  # Excludes NaN or Infinity
+    except (ValueError, TypeError):
+        return False
+
+
 @app.route("/strompreis", methods=["GET"])
 def flask_strompreis():
     # Get the current date and the end date based on prediction hours