story_bike_share_clean_3.py

stations_start = df[['from_station_id', 'from_station_name']]
stations_end = df[['to_station_id', 'to_station_name']]
stations_start.columns = stations_end.columns = ['station_id', 'name']

# Extracts the unique station ID and name combination from the from_station and to_station columns
stations = pd.concat([stations_start, stations_end]).dropna(how='all').drop_duplicates().reset_index(drop=True)