class test_practice(wttest.WiredTigerTestCase):
    uri = "table:test_reposition01"
    format_values = [
        ('row_integer', dict(key_format='i', value_format='S')),
    ]
    conn_config = "cache_size=1GB,statistics=(all),statistics_log=(wait=1,json=true,on_close=true)"
    scenarios = make_scenarios(format_values)

    def test_practice(self):
        format = 'key_format={},value_format={}'.format(self.key_format, self.value_format)
        self.session.create(self.uri, format)

        session1 = self.conn.open_session()
        cur1 = session1.open_cursor(self.uri)

        self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(1))
        nrows = 1_000_000
        rows = 200_000

        for i in range(1, nrows):
            cur1[i] = 'aaaa'
        cur1.reset()

        self.prout("A")
        for i in range(1, nrows):
            self.session.begin_transaction()
            num = random.randrange(1, nrows)
            cur1.set_key(num)
            cur1.search_near()
            cur1.remove()
            self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(2))

        self.prout("B")
        sleep(5)
        for i in range(1, rows):
            # num = random.randrange(1, nrows)
            cur1[i] = 'aaaa'
        cur1.reset()
        self.prout("C")

        sleep(5)
        self.conn.set_timestamp('oldest_timestamp=' + self.timestamp_str(3))
        t0 = time.time()
        for i in range(1, rows):
            self.session.begin_transaction()
            num = random.randrange(1, nrows)
            cur1.set_key(num)
            cur1.search_near()
            cur1.set_value("213")
            cur1.update()        
            if i % 1000 == 0:
                self.prout("H")
            self.session.commit_transaction('commit_timestamp=' + self.timestamp_str(4))
        t1 = time.time()
        total = t1-t0
        self.prout(str(total))

ubuntu@ip-10-122-7-59:~/wiredtiger$ ./run_python_test.sh test_practice
[pid:31042]: A
[pid:31042]: B
[pid:31042]: C
[pid:31042]: H
[pid:31042]: H
[pid:31042]: H
[pid:31042]: H
[pid:31042]: H
[pid:31042]: H
.
.
.
[pid:31042]: 1179.7585327625275
.
----------------------------------------------------------------------
Ran 1 test in 1243.290sOK