python memory error test

gistfile1.txt

ubuntu@ubuntu1:~$ mkdir python-memory
ubuntu@ubuntu1:~$ cd python-memory/
ubuntu@ubuntu1:~/python-memory$ bash
ubuntu@ubuntu1:~$ sudo mkdir /sys/fs/cgroup/memory/hede
ubuntu@ubuntu1:~/python-memory$ cat /sys/fs/cgroup/memory/hede/memory.limit_in_bytes 
18446744073709551615
ubuntu@ubuntu1:~/python-memory$ sudo tee /sys/fs/cgroup/memory/hede/memory.limit_in_bytes 
50000000
50000000
ubuntu@ubuntu1:~/python-memory$ cat /sys/fs/cgroup/memory/hede/memory.limit_in_bytes 
50003968
ubuntu@ubuntu1:~/python-memory$ /bin/echo $$ | sudo tee -a /sys/fs/cgroup/memory/hede/cgroup.procs 
32122
ubuntu@ubuntu1:~/python-memory$ 
ubuntu@ubuntu1:~/python-memory$ cat /sys/fs/cgroup/memory/hede/cgroup.procs
32122
32360
ubuntu@ubuntu1:~/python-memory$ cat /proc/$$/cgroup 
12:name=systemd:/user/1000.user/14.session
11:hugetlb:/user/1000.user/14.session
10:net_prio:/user/1000.user/14.session
9:perf_event:/user/1000.user/14.session
8:blkio:/user/1000.user/14.session
7:net_cls:/user/1000.user/14.session
6:freezer:/user/1000.user/14.session
5:devices:/user/1000.user/14.session
4:memory:/hede
3:cpuacct:/user/1000.user/14.session
2:cpu:/user/1000.user/14.session
1:cpuset:/
ubuntu@ubuntu1:~/python-memory$ cat > hede.py 
def main():
  a=[]
  for i in range(10000000000):
    a[i+1]=i+1

if __name__ == '__main__':
  main()

ubuntu@ubuntu1:~/python-memory$ python hede.py 
Traceback (most recent call last):
  File "hede.py", line 7, in <module>
    main()
  File "hede.py", line 3, in main
    for i in range(10000000000):
MemoryError
ubuntu@ubuntu1:~/python-memory$