| import pandas as pd |
| |
| from hamilton.htypes import column |
| |
| |
| def spend_per_signup(spend: pd.Series, signups: pd.Series) -> column[pd.Series, float]: |
| """The cost per signup in relation to spend.""" |
| return spend / signups |
| |
| |
| def spend_zero_mean(spend: pd.Series, spend_mean: float) -> column[pd.Series, float]: |
| """Shows function that takes a scalar. In this case to zero mean spend.""" |
| return spend - spend_mean |
| |
| |
| def spend_zero_mean_unit_variance( |
| spend_zero_mean: pd.Series, spend_std_dev: float |
| ) -> column[pd.Series, float]: |
| """Function showing one way to make spend have zero mean and unit variance.""" |
| return spend_zero_mean / spend_std_dev |
