python的赋值传递

def f_list(i: list):
    print("list id init:", id(i))
    print("list:", i)
    i += [2]
    print("list id:", id(i))


def f_dict(n: dict):
    print("dict id init:", id(n))
    print("dict:", n)
    n |= {"c": "d"}
    print("dict id:", id(n))


def f_int(m: int):
    print("int id init:", id(m))
    print("int:", m)
    m += 1
    print("int id:", id(m))


def f_str(o: str):
    print("str id init:", id(p))
    print("str:", o)
    o += "o"
    print("str id:", id(o))


if __name__ == '__main__':
    i = [0]
    print("list id init:", id(i))
    f_list(i)
    print(f"list: {i}\n")

    n = {"a": "b"}
    print("dict id init:", id(n))
    f_dict(n)
    print(f"dict: {n}\n")

    m = 1
    print("int id init:", id(m))
    f_int(m)
    print(f"int: {m}\n")

    p = "k"
    print("str id init:", id(p))
    f_str(p)
    print(f"str: {p}\n")Copy

list id init: 4545683712
list id init: 4545683712
list: [0]
list id: 4545683712
list: [0, 2]

dict id init: 4544160960
dict id init: 4544160960
dict: {'a': 'b'}
dict id: 4544160960
dict: {'a': 'b', 'c': 'd'}

int id init: 4543166768
int id init: 4543166768
int: 1
int id: 4543166800
int: 1

str id init: 4544020656
str id init: 4544020656
str: k
str id: 4545737008
str: kCopy