How do I get the first 8 digits from a column with 15 digits?

```
data = [['tom', 355552107972100], ['nick', 356557107972103], ['juli', 455552107972100]]

df = pd.DataFrame(data, columns = ['Name', 'Code']) 

```

```
    Name    Code
0   tom     355552107972100
1   nick    356557107972103
2   juli    455552107972100

```

I want to create a new column with the first 8 digits from the code column