in lib/analyzer-lambda/analyzer-lambda.py [0:0]
def get_source_dataframe(end_time, frequency):
time_window_start = pd.to_datetime(end_time - 3600, unit='s')
time_window_end = pd.to_datetime(end_time, unit='s')
time_window = pd.date_range(
start=time_window_start, end=time_window_end, freq=frequency)
source_df = pd.DataFrame(index=time_window)
source_df.index.name = 'timestamp'
return source_df