Code to duplicate row for each value in an array cell

flat_dataframe.py

def flat(df):
    new = pd.DataFrame()
    for i, s in df.iterrows():
        emails = s['emails'].strip('[]').replace("'", "").split(',')
        for e in emails:
            x = s.copy()
            x['emails'] = e
            new = new.append(x, ignore_index=True)
    return new