BUG: fix python 2.5/3 incompatibilities
BUG: fix python 2.5/3 incompatibilities

karandesai-96/joblib,aabadie/joblib,tomMoral/joblib,tomMoral/joblib,lesteve/joblib,joblib/joblib,lesteve/joblib,karandesai-96/joblib,joblib/joblib,aabadie/joblib