further clean-up and added pressure-

conversion import from single-source

Druckrohrleitung/Druckrohrleitung_class_file.py

@@ -1,6 +1,14 @@
-from pressure_conversion import pressure_conversion
 import numpy as np
 
+#importing pressure conversion function
+import sys
+import os
+current = os.path.dirname(os.path.realpath(__file__))
+parent = os.path.dirname(current)
+sys.path.append(parent)
+from functions.pressure_conversion import pressure_conversion
+
+
 class Druckrohrleitung_class:
 # units
     acceleration_unit   = r'$\mathrm{m}/\mathrm{s}^2$'