code: def set_project_avatar(self, avatar_blob, project_id):
          
          route_values = {}
          if project_id is not None:
              route_values['projectId'] = self._serialize.url('project_id', project_id, 'str')
          content = self._serialize.body(avatar_blob, 'ProjectAvatar')
          self._send(http_method='PUT',
                     location_id='54b2a2a0-859b-4d05-827c-ec4c862f641a',
                     version='5.1-preview.1',
                     route_values=route_values,
                     content=content)
docs: SetProjectAvatar.
          [Preview API] Sets the avatar for the project.
          :param :class:`<ProjectAvatar> <azure.devops.v5_1.core.models.ProjectAvatar>` avatar_blob: The avatar blob data object to upload.
          :param str project_id: The ID or name of the project.