"getdefaultlocale"

  "getdefaultlocale" is deprecated. "getlocale" is suggested as
  a replacement. But "getlocale" does not seem to return RFC 1766
  language codes as promised in the documentation.

  main.py

import locale

print( locale.getdefaultlocale() )
print( locale.getlocale() )

  output

('en_US', 'cp1252')
('English_United States', '1252')

  From the documentation

|locale.getlocale(category=LC_CTYPE)
|
|Returns the current setting for the given locale category as
|sequence containing language code, encoding. category may be
|one of the LC_* values except LC_ALL. It defaults to LC_CTYPE.
|
|Except for the code 'C', the language code corresponds to
|RFC 1766. language code and encoding may be None if their
|values cannot be determined.

  How can I now convert "English_United States" into "en-US"
  (and for other languages and countries too)?