probably working combined code :D

Ausgleichsbecken/Ausgleichsbecken_class_file.py

@@ -1,5 +1,5 @@
 import numpy as np
-from Ausgleichsbecken_functions import FODE_function, get_h_halfstep, get_p_halfstep
+# from Ausgleichsbecken_functions import FODE_function, get_h_halfstep, get_p_halfstep
 
 #importing pressure conversion function
 import sys
@@ -9,6 +9,11 @@ parent = os.path.dirname(current)
 sys.path.append(parent)
 from functions.pressure_conversion import pressure_conversion
 
+def FODE_function(x, h, alpha, p, rho=1000., g=9.81):
+    f = x*abs(x)/h*alpha+g-p/(rho*h)
+    return f
+
+
 class Ausgleichsbecken_class:
 # units 
     # make sure that units and print units are the same

Ausgleichsbecken/Ausgleichsbecken_functions.py

@@ -25,6 +25,6 @@ def e_RK_4(yn, h, dt, Q0, Q1, A0, A1, p0, p1):
     Y2 = yn + dt/2*FODE_function(Y1, h, alpha, p0)
     Y3 = yn + dt/2*FODE_function(Y2, h_hs, alpha, p_hs)
     Y4 = yn + dt*FODE_function(Y3, h_hs, alpha, p_hs)
-    ynp1 = yn + dt/6*(FODE_function(Y1, h, alpha, p)+2*FODE_function(Y2, h_hs, alpha, p_hs)+ \
-        2*FODE_function(Y3, h_hs, alpha, p_hs)+ FODE_function(Y4, h, alpha, p))
+    ynp1 = yn + dt/6*(FODE_function(Y1, h, alpha, p0)+2*FODE_function(Y2, h_hs, alpha, p_hs)+ \
+        2*FODE_function(Y3, h_hs, alpha, p_hs)+ FODE_function(Y4, h, alpha, p0))
 

Ausgleichsbecken/Main_Program.ipynb

@@ -2,7 +2,7 @@
  "cells": [
   {
    "cell_type": "code",
-   "execution_count": 2,
+   "execution_count": 16,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -21,7 +21,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 3,
+   "execution_count": 17,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -46,7 +46,7 @@
   },
   {
    "cell_type": "code",
-   "execution_count": 4,
+   "execution_count": 18,
    "metadata": {},
    "outputs": [],
    "source": [
@@ -133,7 +133,7 @@
  ],
  "metadata": {
   "kernelspec": {
-   "display_name": "Python 3.8.13 ('DT_Slot_3')",
+   "display_name": "Python 3.8.13 ('Georg_DT_Slot3')",
    "language": "python",
    "name": "python3"
   },
@@ -152,7 +152,7 @@
   "orig_nbformat": 4,
   "vscode": {
    "interpreter": {
-    "hash": "4a28055eb8a3160fa4c7e4fca69770c4e0a1add985300856aa3fcf4ce32a2c48"
+    "hash": "84fb123bdc47ab647d3782661abcbe80fbb79236dd2f8adf4cef30e8755eb2cd"
    }
   }
  },