Took 2 seconds.

% sudo python3 -mpip --version
hello world
Traceback (most recent call last):
  File "/usr/lib/python3.6/runpy.py", line 183, in _run_module_as_main
    mod_name, mod_spec, code = _get_module_details(mod_name, _Error)
  File "/usr/lib/python3.6/runpy.py", line 142, in _get_module_details
    return _get_module_details(pkg_main_name, error)
  File "/usr/lib/python3.6/runpy.py", line 109, in _get_module_details
    __import__(pkg_name)
  File "/usr/lib/python3/dist-packages/pip/__init__.py", line 4, in <module>
    import locale
  File "/usr/lib/python3.6/locale.py", line 180, in <module>
    _percent_re = re.compile(r'%(?:\((?P<key>.*?)\))?'
AttributeError: module 're' has no attribute 'compile'
Error in sys.excepthook:
Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 53, in apport_excepthook
    if not enabled():
  File "/usr/lib/python3/dist-packages/apport_python_hook.py", line 28, in enabled
    return re.search(r'^\s*enabled\s*=\s*0\s*$', conf, re.M) is None
AttributeError: module 're' has no attribute 'search'

Original exception was:
Traceback (most recent call last):
  File "/usr/lib/python3.6/runpy.py", line 183, in _run_module_as_main
    mod_name, mod_spec, code = _get_module_details(mod_name, _Error)
  File "/usr/lib/python3.6/runpy.py", line 142, in _get_module_details
    return _get_module_details(pkg_main_name, error)
  File "/usr/lib/python3.6/runpy.py", line 109, in _get_module_details
    __import__(pkg_name)
  File "/usr/lib/python3/dist-packages/pip/__init__.py", line 4, in <module>
    import locale
  File "/usr/lib/python3.6/locale.py", line 180, in <module>
    _percent_re = re.compile(r'%(?:\((?P<key>.*?)\))?'
AttributeError: module 're' has no attribute 'compile'

Same for `python -mhttp.server`, say. 

----

I'd prefer there be a change that the default be always safe from some version on, so that the REPL can do whatever it does, but `-m` etc probably shouldn't even have neither the *initial* current directory *nor* the current current directory in the path unless the interactive session is requested. I am not worried about the garbage that the user would have installed in their own directories breaking things.