class_docstr: Exception when dependencies are missing.
class_docstr_tok: ["Exception","when","dependencies","are","missing","."]
docstr: Return the string representation of the exception.
docstr_tok: ["Return","the","string","representation","of","the","exception","."]
code: def __str__(self):
      """Return the string representation of the exception."""
      prefix = super().__str__()
      unknown_str = ", ".join(map(str, self.missing_dependencies))
      return "{} {}".format(prefix, unknown_str)
  
imports: from satpy.utils import get_logger
label_desc: Use image node_id 2 for calling the MissingDependencies obj's underlying member method code with example usage: obj.__str__() and returns: str