[examples] mention python examples in readmes

README.md

@@ -92,7 +92,8 @@ A class documentation can be generated from the source code using
 [Doxygen][8] (see Installation notes).
 Moreover, the [examples][7] contained in this repository provide a good overview over
 the capabilities of Frackit and can serve as a starting point to develop your own
-application.
+application. While the example descriptions focus on the implementation in c++, python
+implementations for all examples are also available in the respective example folders.
 
 
 Installation

appl/example1/README.md

@@ -8,7 +8,9 @@ Example 1
 
 In this exemplary application, a network of quadrilateral fractures is generated
 within the unit cube (see image above). The main file containing the source code
-to this example is the file `example1.cc` which is located in this folder.
+to this example is the file `example1.cc` which is located in this folder. Note
+that this description focuses on the c++ implementation, but in `example1.py`
+it is illustrated how to realize this example using the Frackit python bindings.
 
 Two main orientations are considered for the quadrilaterals, for both of which
 a corresponding instance of the `QuadrilateralSampler` class is created.

appl/example2/README.md

@@ -6,6 +6,10 @@
 Example 2
 =========
 
+__Note that this description focuses on the c++ implementation given in the main
+file `example2.cc`, but in `example2.py` it is illustrated how to realize this
+example using the Frackit python bindings.__
+
 In this exemplary application, a network of quadrilaterals, following the same
 distributions as the network of [example 1][0], is created. However, in this
 example we want to confine the network to a cylindrical domain (see image above).

appl/example3/README.md

@@ -6,6 +6,10 @@
 Example 3
 =========
 
+__As in the previous examples, this description focuses on the c++ implementation
+given in the main file `example3.cc`, but in `example3.py` you can find how to
+realize this example using the Frackit python bindings.__
+
 In contrast to the [previous example][0], we now want to create a network within
 a complex domain that cannot be represented by the internal geometry classes.
 The domain has been created with [Gmsh][1] and has been saved in .brep file format.