I deal with DataFrame where indexes are dates:

```
Date        Status 1   
2015-01-01  1    
2015-02-01  2    
2015-03-01  2    
2015-04-01  3    
2015-05-01  5

```

I want to compare this DataFrame with a second one that is missing some rows:

```
Date        Status 2    
2015-02-01  2    
2015-03-01  3    
2015-04-01  2    
2015-05-01  6

```

You can see that on 2015-01-01, I have no data 

I want to fill in missing dates with 0s

Can anyone help me with an easy way?

Thanks

PS: Sorry for this post formatting... but I couldn't render nice rows and columns render like on my Spyder