further clean-up and added pressure-

conversion import from single-source

Ausgleichsbecken/Ausgleichsbecken_class_file.py

@@ -1,5 +1,13 @@
-from Ausgleichsbecken import FODE_function, get_h_halfstep, get_p_halfstep
-from pressure_conversion import pressure_conversion
+from Ausgleichsbecken_functions import FODE_function, get_h_halfstep, get_p_halfstep
+
+#importing pressure conversion function
+import sys
+import os
+current = os.path.dirname(os.path.realpath('Main_Programm.ipynb'))
+parent = os.path.dirname(current)
+sys.path.append(parent)
+from functions.pressure_conversion import pressure_conversion
+
 class Ausgleichsbecken_class:
 # units
     area_unit           = r'$\mathrm{m}^2$'