'''Images to and from sqlite'''
import io, sqlite3
from PIL import Image

#How to open a PIL image from a photostream
with open('test-pattern.png', 'rb') as x:
	foto = x.read()

fotostream = io.BytesIO(foto)
image = Image.open(fotostream)

#And now for sqlite3

conn = sqlite3.Connection('imagetest.db')
cursor = conn.cursor()

cursor.execute('CREATE TABLE IF NOT EXISTS images ("name" TEXT, "file" BLOB);')

#make sure you insert the bytes from foto, not the io object
cursor.execute('INSERT INTO images VALUES (?,?)', ('testimage', foto))

#retrieval
cursor.execute('SELECT file from images')
f2stream = io.BytesIO(cursor.fetchone()[0]) #fetchone returns a tuple
f2img = Image.open(f2stream)
f2img = f2img.convert('RGB') # original is RGBA and generates an error
#see https://github.com/python-pillow/Pillow/issues/2609
f2img.save('test-pattern_converted.jpg')

#and save that data
conn.commit()
conn.close()