This example shows , how we can use the topology file:

In topo file we can specify the component like below:
[TOPOLOGY]   

    [[COMPONENT]]
        [[["Mininet1"]]]
       
The usage of this component in the test script like below:

main.Mininet1.checkIP(main.params['CASE1']['destination'])

Here we are using the Mininet1 which of type Mininet 


cd ~/bin/
./launcher --example Topology 
   will execute this example.