Re: règles numéro 4 et 5 en particulier

le lien suivant traite des surrogate

http://lucumr.pocoo.org/2013/7/2/the-updated-guide-to-unicode/

extrait

These functions might be useful:
def remove_surrogate_escaping(s, method='ignore'):
 assert method in ('ignore', 'replace'), 'invalid removal method'
 return s.encode('utf-8', method).decode('utf-8')
def is_surrogate_escaped(s):
 try:
 s.encode('utf-8')
 except UnicodeEncodeError as e:
 if e.reason == 'surrogates not allowed':
 return True
 raise
 return False```

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