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An implementation of BLEU evaluation metric.

$ python calculatebleu.py /path/to/candidate /path/to/reference

The first parameter will be the path to the candidate translation (a single file), and the second parameter will be a path to the reference translations (either a single file, or a directory if there are multiple reference translations).

The program will write an output file called bleu_out.txt which contains a single floating point number, representing the BLEU score of the candidate translation relative to the set of reference translations.

####Notes

• The candidate and reference files will be in UTF-8 encoding.
• You may assume a line-by-line correspondence of sentences between the candidate and reference translations.