## Difference Between MicroPython and Python 3 when setting sys.path

# tested with MicroPython on Linux
# * built from git master
# * version = MicroPython v1.11-194-g3d02ebb4e-dirty
# tested with python3.4 on Linux (Python 3.4.3)
# * using docker container micktwomey/python3.4
# * version = Python 3.4.3 (default, Oct 14 2015, 20:28:29)

##
## TEST1: sys.path from REPL
##
$ ./micropython
MicroPython v1.11-194-g3d02ebb4e-dirty on 2019-08-11; linux version
Use Ctrl-D to exit, Ctrl-E for paste mode
>>> import sys
>>> print(sys.path)
['', '/home/vagrant/.micropython/lib', '/usr/lib/micropython']
>>>

$ python3.4 -S
Python 3.4.3 (default, Oct 14 2015, 20:28:29)
[GCC 4.8.4] on linux
>>> import sys
>>> print(sys.path)
['', '/usr/lib/python3.4/', '/usr/lib/python3.4/plat-x86_64-linux-gnu', '/usr/lib/python3.4/lib-dynload']
>>>

##
## TEST2: sys.path with code via stdin
##
$ echo "import sys;print(sys.path)" | ./micropython
['', '/home/vagrant/.micropython/lib', '/usr/lib/micropython']

$ echo "import sys;print(sys.path)" | python3.4 -S
['', '/usr/lib/python3.4/', '/usr/lib/python3.4/plat-x86_64-linux-gnu', '/usr/lib/python3.4/lib-dynload']


##
## TEST3: sys.path with code via -c command line argument
##
$ ./micropython -c "import sys;print(sys.path)"
['', '/home/vagrant/.micropython/lib', '/usr/lib/micropython']

$ python3.4 -S -c "import sys;print(sys.path)"
['', '/usr/lib/python3.4/', '/usr/lib/python3.4/plat-x86_64-linux-gnu', '/usr/lib/python3.4/lib-dynload']


##
## TEST4: sys.path with script.py run as command line argument
##
## script contents:
##   import sys;print(sys.path)
##
$ pwd
/py_comparison
$ ./micropython script.py
['/py_comparison', '/home/vagrant/.micropython/lib', '/usr/lib/micropython']

$ pwd
/py_comparison
$ python3.4 -S script.py
['/py_comparison', '/usr/lib/python3.4/', '/usr/lib/python3.4/plat-x86_64-linux-gnu', '/usr/lib/python3.4/lib-dynload']


##
## TEST5: sys.path with script.py run as command line argument, from a different directory
##
## script contents:
##   import sys;print(sys.path)
##
$ pwd
/py_comparison
$ ./micropython subdir/script.py
['/py_comparison/subdir', '/home/vagrant/.micropython/lib', '/usr/lib/micropython']

$ pwd
/py_comparison
$ python3.4 -S subdir/script.py
['/py_comparison/subdir', '/usr/lib/python3.4/', '/usr/lib/python3.4/plat-x86_64-linux-gnu', '/usr/lib/python3.4/lib-dynload']