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The bug is that PrettyOutputFormatter.format() returned a unicode object, and Python cannot automatically write unicode objects to output streams where there is no default encoding. The fix is to convert to UTF-8 encoded in a regular string, which can be output to any output device. This makes the output type consistent with DelimitedOutputFormatter.format(). Based on code by Marcell Szabo. Testing: Added a basic test. Played around in an interactive shell to make sure that unicode characters still work in interactive mode. Change-Id: I9de641ecf767a2feef3b9f48b344ef2d55e17a7f Reviewed-on: http://gerrit.cloudera.org:8080/9928 Reviewed-by: Tim Armstrong <tarmstrong@cloudera.com> Tested-by: Impala Public Jenkins <impala-public-jenkins@cloudera.com>