Import six for lambdamart.py

jma127 / pyltr

Python learning to rank (LTR) toolkit

BSD 3-Clause "New" or "Revised" License

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Closed ducthienbui97 closed 4 years ago

ducthienbui97 commented 4 years ago

sorry in my previous PR (#21) didn't figure out I have broken line 479 in lambdamart.py