# Data Pipeline

A step-by-step guide to building a data pipeline.


# Step 1: Extract

``` python
raw = [100, None, 200, None, 300]
```


# Step 2: Transform

``` python
from gdtest_sec_index_hero import process
clean = process(raw, strict=True)  # [100, 200, 300]
```


# Step 3: Load

``` python
from gdtest_sec_index_hero import summarize
output = summarize(clean)
print(output)  # {'count': 3, 'sum': 600, 'mean': 200.0}
```