add pipenv req

README.md

@@ -29,7 +29,7 @@ A wrapper integrates the different components into OMNeT++.
 All result evaluation and plotting is done with Python.
 
 # Installation
-tl;dr: open `install.sh` and adjust the number of cores `NUM_CPUS` to use for compiling; then run `./install.sh` if you're on Linux or `./install.sh mac` if you're on Mac.
+tl;dr: install `pipenv` on your system, open `install.sh` and adjust the number of cores `NUM_CPUS` to use for compiling; then run `./install.sh` if you're on Linux or `./install.sh mac` if you're on Mac.
 
 Long version: all simulator components are bundled together into one installation script `install.sh`.
 By passing `mac` as an argument to the install script, it downloads the Mac version of the OMNeT++ simulator instead of the Linux version; this is the only difference between Linux and Mac versions of this simulator.
@@ -38,6 +38,9 @@ For example, it downloads the OMNeT++ simulator of the right version from GitHub
 If this download via `wget` doesn't succeed, for example because GitHub's servers are beyond their capacity (you'll get a `503` error), then later parts of the script fail. 
 This is a very simple Bash script, so peek inside, it's easy to understand, and there's no error recovery built-in, so please debug using common sense!
 
+Result parsing and graph generation is done using Python in respective scripts in `scenarios/results/`.
+The packages that are required for this are installed in local `pipenv` environments, so make sure that you have `pipenv` available on your system!
+
 ## Debug mode
 By default, the simulator is compiled in release mode so that simulations run faster.
 To compile in debug mode, respective lines are commented-out in the `install.sh`.