import gc
import clr
import psutil
import matplotlib.pyplot as plt
import System

# Create dict store count of objects left
types = [
    str,
    System.String,
]
types = {obj: 0 for obj in types}

N = 1_000
str_size = 1_000_000

memory_py = [0 for _ in range(N + 2)]
memory_py[0] = psutil.virtual_memory().used
for ii in range(N):
    s_py = str('a' * str_size)
    del s_py
    memory_py[ii + 1] = psutil.virtual_memory().used - memory_py[0]

gc.collect()
System.GC.Collect()
# See what types of objects are still present
for obj in gc.get_objects():
    if type(obj) in list(types.keys()):
        types[type(obj)] += 1
print(types)
memory_py[ii + 2] = psutil.virtual_memory().used - memory_py[0]
memory_py[0] = 0

memory_net = [0 for _ in range(N + 2)]
memory_net[0] = psutil.virtual_memory().used
s_py = str('a' * str_size)
for ii in range(N):
    s_net = System.String(s_py)
    del s_net
    memory_net[ii + 1] = psutil.virtual_memory().used - memory_net[0]

gc.collect()
System.GC.Collect()
# See what types of objects are still present
for obj in gc.get_objects():
    if type(obj) in list(types.keys()):
        types[type(obj)] += 1
print(types)
memory_net[ii + 2] = psutil.virtual_memory().used - memory_net[0]
memory_net[0] = 0

import gc
import sys
import clr
import objgraph
import System

s_net = System.String('a')
del s_net

gc.collect()
System.GC.Collect()
for obj in gc.get_objects():
    if type(obj) == System.String:
        print(f'Refcount: {sys.getrefcount(obj)}')
        print(f'Num Referrers: {len(gc.get_referrers(obj))}')
        objgraph.show_backrefs(obj, filename='backref.png')

import ctypes
from System import Uri

u = Uri('http://google.com')
addr = id(u)

rc = ctypes.c_long.from_address(addr).value

del u
# tp_dealloc not called

var uri = new Uri("http://google.com").ToPython();
// uri.Refcount == 1
uri.Dispose();
// `tp_dealloc` called