Made number of partitions an optional argument
Made number of partitions an optional argument

kunallillaney/thunder,j-friedrich/thunder,broxtronix/thunder,pearsonlab/thunder,broxtronix/thunder,poolio/thunder,thunder-project/thunder,oliverhuangchao/thunder,kunallillaney/thunder,kcompher/thunder,jwittenbach/thunder,mikarubi/thunder,zhwa/thunder,oliverhuangchao/thunder,j-friedrich/thunder,poolio/thunder,kcompher/thunder,zhwa/thunder,pearsonlab/thunder,mikarubi/thunder