from urllib.parse   import quote
print(quote("А"))

  
>>> import urllib.parse
>>> urllib.parse.quote('я')
'%D1%8F'
>>> 'я'.encode('utf-8')
b'\xd1\x8f'
>>>

  
>>> ''.join('%{:02X}'.format(i) for i in 'я'.encode('utf-8'))
'%D1%8F'
>>>

  
>>> ''.join('%{:2X}'.format(i) for i in 'абв\t\t\t'.encode('utf-8'))
'%D0%B0%D0%B1%D0%B2% 9% 9% 9'
>>> ''.join('%{:02X}'.format(i) for i in 'абв\t\t\t'.encode('utf-8'))
'%D0%B0%D0%B1%D0%B2%09%09%09'
>>>