code: def from_pem(cls, data, password=None):
          
          obj = cls()
          obj.import_from_pem(data, password)
          return obj
docs: Creates a key from PKCS#8 formatted data loaded from a PEM file.
             See the function `import_from_pem` for details.
  
          :param data(bytes): The data contained in a PEM file.
          :param password(bytes): An optional password to unwrap the key.