I want to install virtualenv and virtualenvwrapper with pip on ubuntu 16.4. 
I have been install python3.6, python3.7 and python3.8 in my machine. 
I try these commands: 
sudo python3.6 -m pip install virtualenv virtualenvwrapper
sudo python3.7 -m pip install virtualenv virtualenvwrapper
sudo python3.8 -m pip install virtualenv virtualenvwrapper
But all of them made a a same error like this(notice this is error for run with python3.7):
Traceback (most recent call last):
  File "/usr/lib/python3.7/runpy.py", line 193, in _run_module_as_main
    "__main__", mod_spec)
  File "/usr/lib/python3.7/runpy.py", line 85, in _run_code
    exec(code, run_globals)
  File "/usr/lib/python3/dist-packages/pip/__main__.py", line 19, in <module>
    sys.exit(pip.main())
  File "/usr/lib/python3/dist-packages/pip/__init__.py", line 215, in main
    locale.setlocale(locale.LC_ALL, '')
  File "/usr/lib/python3.7/locale.py", line 608, in setlocale
    return _setlocale(category, locale)
locale.Error: unsupported locale setting
What should I do?
Also I couldn't install any package with pip !
 
    