I have a dataframe such as

```
Names Values 
A     0.20
A     1.30
A     1.2
B     0.30
B     0.40
C     1.2
D     0.70
E     0.12
E     1.3
F     0.90
F     0.78
F     0.88

```

And I would like to add to a `New_col` the number :

* `1` where for each `Names` with at least one `Values > 0.75` **and** one `Values < 0.75`
* `0` for each `Names` with only `Values > 0.75`
* `2` for each `Names` with only `Values < 0.75`

I should then get:

```
Names Values New_col
A     0.20   1
A     1.30   1
A     1.2    1
B     0.30   2
B     0.40   2
C     1.2    0
D     0.70   2
E     0.12   1
E     1.3    1
F     0.90   2
F     0.78   2
F     0.88   2

```