duplicate conditions   mapper.py: line14   

```
return [(k,str(v)) for k,v in self.entity.__dict__.iteritems() if not k.startswith("_") and not k.startswith("__")]
```

It's the same as:

```
return [(k,str(v)) for k,v in self.entity.__dict__.iteritems() if not k.startswith("_")]
```
