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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def get_default_lab_path(self, config):
 """Generate a default laboratory path based on user environment."""

        # Default path settings

        # Append project name if present (NCI-specific)
        default_project = os.environ.get('PROJECT', '')
        default_short_path = os.path.join('/short', default_project)
        default_user = pwd.getpwuid(os.getuid()).pw_name

        short_path = config.get('shortpath', default_short_path)
        lab_name = config.get('laboratory', self.model_type)

        if os.path.isabs(lab_name):
            lab_path = lab_name
        else:
            user_name = config.get('user', default_user)
            lab_path = os.path.join(short_path, user_name, lab_name)

        return lab_path