def __init__(
self,
start_time, # Start time of time slice
end_time, # End time of time slice
time_slice_duration, # Time slice length in real minutes
time_unit_duration, # 1 time unit = ? real minutes
hex_bins): # List of hexagon bins
# Get proper month and year to query the right table
start_month = start_time.strftime("%B").lower()
start_year = start_time.strftime("%y")
end_month = end_time.strftime("%B").lower()
end_year = end_time.strftime("%y")
# Month overflow flag is set if start time and end time are
# in different months
month_overflow_flag = (start_month != end_month)
# Create the query
query = """ \
SELECT \
*, \
1 AS weight \
FROM \
`yt-{0}-{1}` \
WHERE \
tpep_pickup_datetime BETWEEN '{2}' AND '{3}' \
AND pickup_bin IS NOT NULL \
AND dropoff_bin IS NOT NULL \
AND pickup_bin != dropoff_bin; \
"""
# Read the query output
if not month_overflow_flag:
df = DataProvider.read_sql_query(
query.format(start_month, start_year, start_time, end_time))
else:
d0 = DataProvider.read_sql_query(
query.format(start_month, start_year, start_time, end_time))
d1 = DataProvider.read_sql_query(
query.format(end_month, end_year, start_time, end_time))
df = pd.concat([d0, d1])
# Assign instance variables
self.df = df
self.start_time = start_time
self.end_time = end_time
self.time_slice_duration = time_slice_duration
self.time_unit_duration = time_unit_duration
self.hex_bins = hex_bins
def get_trips_data(self):
"""
Gets data for appropriate weekday and month
:param:
:return df:
"""
# Create SQL query
query = """ \
SELECT \
*,
HOUR(tpep_pickup_datetime) as pickup_hour\
FROM \
`yt-{0}-{1}` \
WHERE \
WEEKDAY(tpep_pickup_datetime) like {2} \
AND pickup_bin IS NOT NULL \
AND dropoff_bin IS NOT NULL \
AND pickup_bin != dropoff_bin; \
"""
# Read query output and select required columns
df = DataProvider.read_sql_query(
query.format(self.month, self.year, self.weekday))
cols = [
'tpep_pickup_datetime', 'tpep_dropoff_datetime', 'trip_distance',
'fare_amount', 'duration_seconds', 'pickup_bin', 'dropoff_bin',
'pickup_hour'
]
df = df[cols]
return df