old_contents: __all__ = ['exceptions', 'OxyFloat']
  
  from oxyfloat.OxyFloat import OxyFloat
  from oxyfloat.exceptions import RequiredVariableNotPresent, OpenDAPServerError
  
new_contents: __all__ = ['exceptions', 'OxyFloat']
  
  from .OxyFloat import OxyFloat
  from .exceptions import RequiredVariableNotPresent, OpenDAPServerError
  
subject: Use relative imports