Unicode
Error handling
- Encoding/decoding errors result in UnicodeError exception.
- Can control behavior with optional errors parameter
'strict' # Errors cause UnicodeError exception
'ignore' # Errors are silently ignored
'replace' # Bad characters replaced by special replacement character
>>> a = u"M\u00fcller"
>>> a.encode('ascii')
UnicodeError: ASCII encoding error: ordinal not in range(128)
>>> a.encode('ascii','ignore')
'Mller'
>>> a.encode('ascii','replace')
'M?ller'
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