# Advanced Demo

This demo chains multiple operations together.

``` python
from gdtest_sec_index_hero import process, summarize, validate

data = process([10, 20, None, 30, 40], strict=True)
stats = summarize(data)
print(stats)  # {'count': 4, 'sum': 100, 'mean': 25.0}

schema = {'count': int, 'sum': int, 'mean': float}
assert validate(schema, stats)
```