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wxchan authored and Guolin Ke committed dd425973a56
python code style with pep8 (#161) * format python code with pep8 * **DO NOT MERGE** deliberately break rules to see what will happen during check * Revert "**DO NOT MERGE** deliberately break rules to see what will happen during check" This reverts commit 0db93cd7a43c7efa43a2112ada43d46c6f9115d9. * fix format in test.py * add docs for pep-8