>>> from pypremis.lib import PremisRecord
>>> example_record = PremisRecord(frompath='testObject.xml')
>>> example_object = example_record.get_object_list()[0]
>>> print(example_object.get_objectIdentifier(0))
<premis:objectIdentifier><premis:objectIdentifierType>object_identifier_type</premis:objectIdentifierType><premis:objectIdentifierValue>object_identifier_value</premis:objectIdentifierValue></premis:objectIdentifier>
>>> example_object_identifier = example_object.get_objectIdentifier(0)
>>> print(example_object_identifier.get_objectIdentifierValue())
object_identifier_value
>>>

>>> from pypremis.lib import PremisRecord
>>> from pypremis.nodes import *
>>> object_identifier = ObjectIdentifier('object id type example value', 'object id value example value')
>>> format_designation = FormatDesignation(formatName='format name example value')
>>> format = Format(formatDesignation=format_designation)
>>> object_characteristics = ObjectCharacteristics(format=format)
>>> o = Object(object_identifier, "file", object_characteristics)
>>> print(o)
<premis:object xsi:type="premis:file"><premis:objectIdentifier><premis:objectIdentifierType>object id type example value</premis:objectIdentifierType><premis:objectIdentifierValue>object id value example value</premis:objectIdentifierValue></premis:objectIdentifier><premis:objectCharacteristics><premis:format><premis:formatDesignation><premis:formatName>format name example value</premis:formatName></premis:formatDesignation></premis:format></premis:objectCharacteristics></premis:object>
>>> example_record = PremisRecord(objects=[o])
>>> example_record.write_to_file('example_record.xml')
>>> exit()

>>> from pypremis.lib import PremisRecord
>>> from pypremis.nodes import *
>>> example_record = PremisRecord(frompath='example_record.xml')
>>> obj = example_record.get_object_list()[0]
>>> obj.set_originalName('example_file.txt')
>>> obj.get_objectIdentifier(0).set_objectIdentifierType('not the same type as before')
>>> example_record.write_to_file('example_record_v2.xml')
>>> exit()