code cleanup:

consistenly use getter and setter methods
commenting etc

Kraftwerk/Kraftwerk_class_file.py

@@ -0,0 +1,19 @@
+#importing Druckrohrleitung
+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
+from Turbinen.Turbinen_class_file import Francis_Turbine
+
+class Kraftwerk_class:
+    def __init__(self):
+        self.turbines = []
+
+    def add_turbine(self,turbine):
+        self.turbines.append(turbine)
+
+    def print_info(self):
+        for turbine in self.turbines:
+            turbine.get_info(full=True)