Revision 1d39e245 lib/utils/io.py

b/lib/utils/io.py
135 135 
      if callable(prewrite):
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        prewrite(fd)
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      if data is not None:
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        if isinstance(data, unicode):
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          data = data.encode()
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        assert isinstance(data, str)
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        to_write = len(data)
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        offset = 0
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        while offset < to_write:
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          written = os.write(fd, buffer(data, offset))
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          assert written >= 0
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          assert written <= to_write - offset
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          offset += written
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        assert offset == to_write
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      else:

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