shithub: riscv

ref: a57a6e511f15c02b4fd2690197b6f1333b171193
dir: /sys/src/cmd/python/Doc/lib/sqlite3/countcursors.py/

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import sqlite3

class CountCursorsConnection(sqlite3.Connection):
    def __init__(self, *args, **kwargs):
        sqlite3.Connection.__init__(self, *args, **kwargs)
        self.numcursors = 0

    def cursor(self, *args, **kwargs):
        self.numcursors += 1
        return sqlite3.Connection.cursor(self, *args, **kwargs)

con = sqlite3.connect(":memory:", factory=CountCursorsConnection)
cur1 = con.cursor()
cur2 = con.cursor()
print con.numcursors