code: def write_file(self, fileobject, skip_unknown=False):
          
          self.set_metadata_version()
  
          for field in _version2fieldlist(self['Metadata-Version']):
              values = self.get(field)
              if skip_unknown and values in ('UNKNOWN', [], ['UNKNOWN']):
                  continue
              if field in _ELEMENTSFIELD:
                  self._write_field(fileobject, field, ','.join(values))
                  continue
              if field not in _LISTFIELDS:
                  if field == 'Description':
                      if self.metadata_version in ('1.0', '1.1'):
                          values = values.replace('\n', '\n        ')
                      else:
                          values = values.replace('\n', '\n       |')
                  values = [values]
  
              if field in _LISTTUPLEFIELDS:
                  values = [','.join(value) for value in values]
  
              for value in values:
                  self._write_field(fileobject, field, value)
docs: Write the PKG-INFO format data to a file object.