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import sqlite3
class db:
# https://docs.python.org/3/library/sqlite3.html
def __init__(self, dbfile):
# final variable
self.dbfile = dbfile
try:
open(dbfile)
except FileNotFoundError:
self.setup()
def exec(self, cmd, param=None):
"""
A function to execute a database command without having to
create the cursor
"""
con = sqlite3.connect(self.dbfile)
cur = con.cursor()
if param == None:
o = cur.execute(cmd)
else:
o = cur.execute(cmd, param)
con.commit()
con.close()
return o
def setup(self):
"""
Necessary when the database does not exist and the tables must be
created for the first time, otherwise not needed to be run.
"""
con = sqlite3.connect(self.dbfile)
cur = con.cursor()
cur.execute(
"""
CREATE TABLE temperature (
date text not null,
time integer not null,
temperature real,
target real,
PRIMARY KEY (date, time)
);
"""
)
cur.execute(
"""
CREATE TABLE weather (
date text not null,
temperature real,
wind real,
PRIMARY KEY (date),
FOREIGN KEY (date) REFERENCES temperature(date)
);
"""
)
cur.execute(
"""
CREATE TABLE schedule (
day text not null,
time integer not null,
temperature real,
PRIMARY KEY (day, time)
);
"""
)
cur.execute(
"""
CREATE TABLE history (
date text not null,
time integer not null,
heating_on integer,
PRIMARY KEY (date, time),
FOREIGN KEY (date) REFERENCES temperature(date),
FOREIGN KEY (time) REFERENCES temperature(time)
);
"""
)
con.commit()
con.close()
pass
def export_csv(self):
return 0
|
