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flights.py
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import sys
import simplejson as json
import datetime
import decimal
import mariadb
import os
import flask
from flask import request
from flask import Blueprint
from dotenv import load_dotenv
load_dotenv()
flights = Blueprint('flights', __name__)
config = {
'host': os.getenv("DB_HOST"),
'port': int(os.getenv("DB_PORT")),
'user': os.getenv("DB_USER"),
'password': os.getenv("DB_PASS")
}
def converter(o):
if isinstance(o, datetime.datetime):
return o.__str__()
@flights.route('/api/flights/airlines_stats', methods=['GET'])
def airline_stats():
origin = request.args.get('o')
dest = request.args.get('dst')
yearFrom = request.args.get('yf')
yearTo = request.args.get('yt')
month = request.args.get('m')
day = request.args.get('d')
conn = mariadb.connect(**config)
cur = conn.cursor()
query = "select " \
"q.carrier, " \
"q.airline, " \
"q.volume flight_count, " \
"round(100 * q.volume / sum(q.volume) over " \
"(order by q.airline rows between unbounded preceding and unbounded following),2) market_share_pct, " \
"round(100 * (q.`delayed` / q.volume), 2) delayed_pct, " \
"round(100 * (q.cancelled / q.volume), 2) cancelled_pct, " \
"round(100 * (q.diverted / q.volume), 2) diverted_pct " \
"from ( " \
"select f.carrier, a.airline, count(*) volume, " \
"sum(case when dep_delay > 0 then 1 else 0 end) `delayed`, " \
"sum(diverted) diverted, sum(cancelled) cancelled " \
"from flights f join airlines a on f.carrier = a.iata_code " \
"where " \
"f.origin = ? and " \
"f.dest = ? and " \
"f.year >= ? and " \
"f.year <= ?"
if month is not None:
query += " and f.month = " + month
if day is not None:
query += " and f.day = " + day
query += " group by a.airline, f.carrier) q order by flight_count desc"
cur.execute(query,(origin,dest,yearFrom,yearTo))
row_headers=[x[0] for x in cur.description]
rv = cur.fetchall()
json_data=[]
for result in rv:
json_data.append(dict(zip(row_headers,result)))
return json.dumps(json_data)
@flights.route('/api/flights/airline_delays', methods=['GET'])
def airline_delays():
origin = request.args.get('o')
dest = request.args.get('dst')
airline = request.args.get('a')
yearFrom = request.args.get('yf')
yearTo = request.args.get('yt')
month = request.args.get('m')
day = request.args.get('d')
conn = mariadb.connect(**config)
cur = conn.cursor()
query = "select " \
"round(100 * (weather_delayed / total_delayed), 2) weather_delay_pct, " \
"round(100 * (carrier_delayed / total_delayed), 2) carrier_delay_pct, " \
"round(100 * (nas_delayed / total_delayed), 2) nas_delay_pct, " \
"round(100 * (security_delayed / total_delayed), 2) security_delay_pct, " \
"round(100 * (late_aircraft_delayed / total_delayed), 2) late_aircraft_delay_pct " \
"from (" \
"select " \
"carrier_delayed, nas_delayed, security_delayed, late_aircraft_delayed, weather_delayed, " \
"(carrier_delayed+nas_delayed+security_delayed+late_aircraft_delayed+weather_delayed) total_delayed " \
"from (" \
"select " \
"avg(carrier_delay) carrier_delayed, " \
"avg(nas_delay) nas_delayed, " \
"avg(security_delay) security_delayed, " \
"avg(late_aircraft_delay) late_aircraft_delayed, " \
"avg(weather_delay) weather_delayed " \
"from " \
"flights f join airlines a on f.carrier = a.iata_code " \
"where " \
"f.origin = ? and f.dest = ? and f.carrier = ? and f.year >= ? and f.year <= ?"
if month is not None:
query += " and f.month = " + month
if day is not None:
query += " and f.day = " + day
query += " group by a.airline, f.carrier) a) b"
cur.execute(query,(origin, dest, airline, yearFrom, yearTo))
row_headers=[x[0] for x in cur.description]
result = cur.fetchone()
json_obj=dict(zip(row_headers,result))
return json.dumps(json_obj)
@flights.route('/api/flights/delays_comparison', methods=['GET'])
def delays_comparison():
origin = request.args.get('o')
dest = request.args.get('dst')
airline = request.args.get('a')
yearFrom = request.args.get('yf')
yearTo = request.args.get('yt')
month = request.args.get('m')
day = request.args.get('d')
conn = mariadb.connect(**config)
cur = conn.cursor()
query = "select " \
"avg(carrier_delay) carrier, " \
"avg(nas_delay) nas, " \
"avg(security_delay) sec, " \
"avg(late_aircraft_delay) late_aircraft, " \
"avg(weather_delay) weather " \
"from " \
"flights f " \
"where " \
"f.origin = ? " \
"and f.dest = ? " \
"and f.carrier = ? " \
"and f.year >= ? and f.year <= ?"
if month is not None:
query += " and f.month = " + month
if day is not None:
query += " and f.day = " + day
query += " union select " \
"avg(carrier_delay) carrier, " \
"avg(nas_delay) nas, " \
"avg(security_delay) sec, " \
"avg(late_aircraft_delay) late_aircraft, " \
"avg(weather_delay) weather " \
"from " \
"flights f " \
"where " \
"f.origin = ? " \
"and f.dest = ? " \
"and f.year >= ? and f.year <= ?"
if month is not None:
query += " and f.month = " + month
if day is not None:
query += " and f.day = " + day
cur.execute(query,(origin, dest, airline, yearFrom, yearTo, origin, dest, yearFrom, yearTo))
row_headers=[x[0] for x in cur.description]
rv = cur.fetchall()
json_data=[]
for result in rv:
json_data.append(dict(zip(row_headers,result)))
return json.dumps(json_data, default = converter)