33 lines
1 KiB
Python
33 lines
1 KiB
Python
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class Bytes(object):
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""" Wrapper around strings and unicode objects to ensure we are always using
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the correct encoded or decoded data.
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"""
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def __init__(self, data):
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assert isinstance(data, str)
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self._encoded_data = data
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@classmethod
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def for_string_or_unicode(cls, input):
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# If the string is a unicode string, then encode its data as UTF-8. Note that
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# we don't catch any decode exceptions here, as we want those to be raised.
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if isinstance(input, unicode):
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return Bytes(input.encode('utf-8'))
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# Next, try decoding as UTF-8. If we have a utf-8 encoded string, then we have no
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# additional conversion to do.
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try:
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input.decode('utf-8')
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return Bytes(input)
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except UnicodeDecodeError:
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pass
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# Finally, if the data is (somehow) a unicode string inside a `str` type, then
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# re-encoded the data.
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return Bytes(input.encode('utf-8'))
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def as_encoded_str(self):
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return self._encoded_data
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def as_unicode(self):
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return self._encoded_data.decode('utf-8')
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