When local echo is enabled, pexpect will also match on send lines to the
node. So could think a node is echoing when it is only seeing the sent
message.
The sent messages are still written to `logfile` but now only once.
This may show issues with our current tests implementation that expected
this behavior.
I had this idea when implementing #10382 and #10392 as I introduced a
very similar structure to python's standard unittests in those and it
could also reduce some code duplication between those two tests.
If not defined it was raising a KeyError. Use the 'get' function to
handle non defined value.
It did not put the value in the `default` case as it would have changed
the behavior when `RIOTBASE` is defined but empty.
Introduce dist/pythonlibs directory to store RIOT python packages.
This directory is exported via PYTHONPATH by the build system to
make it commonly available.
