Could you please store the iterable in a temporary variable that doesn't span >79 chars? Something like:

```python
iter_ = (('column_marginals', column_marginals), 
           ('row_marginals', row_marginals), 
           ('U', U), 
           ('U_res', U_res), 
           ('U_hat', U_hat), 
           ('U_hat_res', U_hat_res), 
           ('u', u), 
           ('Y_hat', Y_hat), 
           ('s', s), 
           ('s_res', s_res), 
           ('X_weighted', X_weighted[:, :rank_lstsq]))
```