>>> [print(f'u{ord(_):04x}') for _ in 'いろは']
u3044
u308d
u306f
[None, None, None]

>>> [print(f'{_:02x}') for _ in 'いろは'.encode('utf-8')]
e3
81
84
e3
82
8d
e3
81
af
[None, None, None, None, None, None, None, None, None]