import sys

def who_am_i():
    return sys._getframe(1).f_code.co_name

print(who_am_i())

def update(d):
    d = {"y": 0}
    d["x"] = 5

data = {"x": 1}
update(data)
print(data.get("x"))

def f(**kwargs):
    return sum(kwargs.values())

print(f(a=1, b=2, c=3))

def f(d={}):
    d["count"] = d.get("count", 0) + 1
    return d["count"]

print(f(), f(), f())

def f(a, d={}):
    d[a] = d.get(a, 0) + 1
    return d

print(f("x"), end=" ")
print(f("x"))

def f(x):
    return {i: i**x for i in range(3)}

print(f(2)[1])

def f(a, b):
    a["val"] += b["val"]
    b = {"val": 0}

x = {"val": 1}
y = {"val": 2}
f(x, y)
print(x["val"], y["val"])

def f(s):
    s.add(4)

a = {1, 2, 3}
f(a)
print(sorted(a))

def g():
    return set("hello")

s = g()
print(len(s))

def combine(a, b):
    return a & b

x = {1, 2, 3}
y = {2, 3, 4}
print(combine(x, y))