46. 기본값 인자와 가변 인자, 키워드 인자

1def add_item(item, box=[]):
2    box.append(item)
3    return box
4 
5 
6def total(*args, scale=1):
7    s = 0
8    for a in args:
9        s += a
10    return s * scale
11 
12 
13def info(name, age=20, **opts):
14    return f"{name}/{age}/{len(opts)}"
15 
16 
17print(add_item(1))
18print(add_item(2))
19print(add_item(3, []))
20print(add_item(4))
21print(total(1, 2, 3))
22print(total(4, 5, scale=2))
23nums = [1, 2]
24print(total(*nums, 10))
25print(info("민", city="서울"))
26print(info("준", 30, a=1, b=2))