Material: redundant card reader and writer, add some print messages

src/Mod/Material/Material.py

@@ -20,6 +20,9 @@
 # *                                                                         *
 # ***************************************************************************
 
+import FreeCAD
+
+
 # here the usage description if you use this tool from the command line ("__main__")
 CommandlineUsage = """Material - Tool to work with FreeCAD Material definition cards
 
@@ -49,8 +52,9 @@ Version:
 """
 
 
-# see comments in module importFCMat, there is an independent parser implementation for reading and writing FCMat files
-# inside FreeCAD a mixture of these parsers and the ones in importFCMat.py is used
+# see comments in module importFCMat, there is an independent parser implementation
+# for reading and writing FCMat files
+# inside FreeCAD mostly the one from importFCMat.py is used
 
 
 def importFCMat(fileName):
@@ -60,6 +64,10 @@ def importFCMat(fileName):
     except ImportError:
         import configparser
 
+    FreeCAD.Console.PrintError(
+        'This mat card reader is probably depretiated and not widely used in FreeCAD. '
+        'See comment in Material.py module.\n'
+    )
     Config = configparser.RawConfigParser()
     Config.optionxform = str
     Config.read(fileName)
@@ -81,6 +89,10 @@ def exportFCMat(fileName, matDict):
     import string
     Config = configparser.RawConfigParser()
 
+    FreeCAD.Console.PrintError(
+        'This mat card writer is probably depretiated and not widely used in FreeCAD. '
+        'See comment in Material.py module.\n'
+    )
     # create groups
     for x in matDict.keys():
         grp, key = string.split(x, sep='_')