Cannot select rows based on value in column
#### Code Sample
<img width="1024" alt="screen shot 2018-06-11 at 1 45 11 pm" src="https://user-images.githubusercontent.com/29179747/41220253-692300a2-6d7e-11e8-9848-c59e5ff4aa31.png">

```python
Running 
df.loc[df.Days > 75, :]

```
#### Problem description

Returns ValueError: Cannot index with multidimensional key

#### Expected Output
What I want to is select all the rows where Days > 75