test_copy.py 文件源码

def _copy_from(self, curs, nrecs, srec, copykw):
        f = StringIO()
        for i, c in izip(xrange(nrecs), cycle(string.ascii_letters)):
            l = c * srec
            f.write("%s\t%s\n" % (i, l))

        f.seek(0)
        curs.copy_from(MinimalRead(f), "tcopy", **copykw)

        curs.execute("select count(*) from tcopy")
        self.assertEqual(nrecs, curs.fetchone()[0])

        curs.execute("select data from tcopy where id < %s order by id",
                (len(string.ascii_letters),))
        for i, (l,) in enumerate(curs):
            self.assertEqual(l, string.ascii_letters[i] * srec)