old_contents: from .stdlibcompat import StdlibCompat
  from .xtraceback import XTraceback
  
  from . import pycompat
  del pycompat
  
  __version__ = "0.3.3"
  
  compat = StdlibCompat()
  __enter__ = compat.__enter__
  __exit__ = compat.__exit__
  
new_contents: from .stdlibcompat import StdlibCompat
  from .xtraceback import XTraceback
  
  from . import pycompat
  del pycompat
  
  __version__ = "0.4.0-dev"
  
  compat = StdlibCompat()
  __enter__ = compat.__enter__
  __exit__ = compat.__exit__
  
subject: bump version for dev