recalculating_winners_vs_losers.py

# Comparing pages from before and after the switch
true_change = true_totals_after.merge(true_totals_before, 
                            left_on="true_url", 
                            right_on="true_url", 
                            suffixes=["_after", "_before"], 
                            how="outer")

true_change.loc[:, ["ga:newUsers_after", "ga:newUsers_before"]].fillna(0, inplace=True)


true_change['difference'] = true_change['ga:newUsers_after'] - true_change['ga:newUsers_before']
true_change['percent_change'] = true_change['difference'] / true_change['ga:newUsers_before']


true_winners = true_change[true_change['percent_change'] > 0]
true_losers = true_change[true_change['percent_change'] < 0]
true_no_change = true_change[true_change['percent_change'] == 0]