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app.py
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app.py
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# python modules
import datetime as dt
import numpy as np
import pandas as pd
# sql modules
import sqlalchemy
from sqlalchemy.ext.automap import automap_base
from sqlalchemy.orm import Session
from sqlalchemy import create_engine, func
# flask modules
from flask import Flask, jsonify
# set up SQLAlchemy
engine = create_engine("sqlite:///Resources/hawaii.sqlite")
Base = automap_base()
Base.prepare(engine, reflect=True)
# print(Base.classes.keys())
Measurement = Base.classes.measurement
Station = Base.classes.station
# session
session = Session(engine)
# Flask app
app = Flask(__name__)
@app.route("/")
def main():
return """<html>
<style>
body {
background-image: linear-gradient(rgba(0, 0, 0, 0.5), rgba(0, 0, 0, 0.5)),url(https://images.pexels.com/photos/2521620/pexels-photo-2521620.jpeg?auto=compress&cs=tinysrgb&dpr=2&h=650&w=940);
background-size: cover;
}
h1 {
text-align: center;
font-size: 70px;
padding-top: 20px;
color: white;
}
h2{
text-align: center;
font-size: 40px;
padding-left: 20px;
color: white;
}
ul{
display: inline;
align-items: center;
text-align: center;
}
li {
font-size: 23px;
list-style: disc;
padding-left: 30px;
line-height: 1.5;
font-weight: bold;
color: white;
}
</style>
<body>
<h1>Surf's Up: Hawaii Climate</h1>
<em><h2>Available Routes</h2></em>
<ul>
<li>
Precipitation: /api/v1.0/precipitation
</li>
<li>
Station: /api/v1.0/stations
</li>
<li>
Temperature: /api/v1.0/tobs
</li>
<li>
Start Date: /api/v1.0/<start>
</li>
<li>
Start & End Dates: /api/v1.0/<start>/<end>
</li>
</ul>
</body>
</html>"""
@ app.route("/api/v1.0/precipitation")
def precipitation():
prcp_data = session.query(Measurement.date, Measurement.prcp).\
order_by(Measurement.date.desc()).all()
session.close()
prcp_data_list = dict(prcp_data)
return jsonify(prcp_data_list)
@ app.route("/api/v1.0/stations")
def stations():
all_stations = session.query(Station.station, Station.name).all()
session.close()
stations_list = list(all_stations)
return jsonify(stations_list)
@ app.route("/api/v1.0/tobs")
def tobs():
year_ago = dt.date(2017, 8, 23) - dt.timedelta(days=365)
tobs_query = session.query(Measurement.date, Measurement.tobs).filter(
Measurement.date >= year_ago).all()
session.close()
tobs_list = list(np.ravel(tobs_query))
return jsonify(tobs_list)
@ app.route("/api/v1.0/<start>")
def oneDate(start):
start_date = dt.datetime.strptime(start, "%Y-%m-%d")
temp_info = session.query(func.min(Measurement.tobs), func.avg(Measurement.tobs), func.max(Measurement.tobs)).\
filter(Measurement.date >= start_date).all()
session.close()
temp_data = list(np.ravel(temp_info))
return jsonify(temp_data)
@ app.route("/api/v1.0/<start>/<end>")
def calc_temps(start, end):
start_date = dt.datetime.strptime(start, "%Y-%m-%d")
end_date = dt.datetime.strptime(end, "%Y-%m-%d")
if end != "":
temp_info = session.query(func.min(Measurement.tobs), func.avg(Measurement.tobs), func.max(Measurement.tobs)).\
filter(Measurement.date >= start_date).filter(
Measurement.date <= end_date).all()
session.close()
temp_data = list(np.ravel(temp_info))
return jsonify(temp_data)
else:
temp_info = session.query(func.min(Measurement.tobs), func.avg(
Measurement.tobs), func.max(Measurement.tobs)).filter(Measurement.date > end_date).all()
session.close()
temp_data = list(np.ravel(temp_info))
return jsonify(temp_data)
if __name__ == "__main__":
app.run(debug=True)