1import sqlite3 2 3class Point(object): 4 def __init__(self, x, y): 5 self.x, self.y = x, y 6 7 def __repr__(self): 8 return "(%f;%f)" % (self.x, self.y) 9 10def adapt_point(point): 11 return "%f;%f" % (point.x, point.y) 12 13def convert_point(s): 14 x, y = map(float, s.split(";")) 15 return Point(x, y) 16 17# Register the adapter 18sqlite3.register_adapter(Point, adapt_point) 19 20# Register the converter 21sqlite3.register_converter("point", convert_point) 22 23p = Point(4.0, -3.2) 24 25######################### 26# 1) Using declared types 27con = sqlite3.connect(":memory:", detect_types=sqlite3.PARSE_DECLTYPES) 28cur = con.cursor() 29cur.execute("create table test(p point)") 30 31cur.execute("insert into test(p) values (?)", (p,)) 32cur.execute("select p from test") 33print "with declared types:", cur.fetchone()[0] 34cur.close() 35con.close() 36 37####################### 38# 1) Using column names 39con = sqlite3.connect(":memory:", detect_types=sqlite3.PARSE_COLNAMES) 40cur = con.cursor() 41cur.execute("create table test(p)") 42 43cur.execute("insert into test(p) values (?)", (p,)) 44cur.execute('select p as "p [point]" from test') 45print "with column names:", cur.fetchone()[0] 46cur.close() 47con.close() 48