*Memo:
- My post explains the iterable unpacking with
*and a function (1). - My post explains the iterable unpacking with
*and a function (2). - My post explains the unpacking with an assignment statement (1).
- My post explains the unpacking with an assignment statement (2).
- My post explains the unpacking with a
forstatement (1). - My post explains the unpacking with a
forstatement (2). - My post explains the dictionary unpacking with
**within a dictionary and function. - My post explains
*args. - My post explains
**kwargs.
Iterable unpacking can be done with * and a function as shown below:
<Iterable unpacking with func(p1, p2, p3, p4, p5, p6)>:
def func(p1='a', p2='b', p3='c', p4='d', p5='e', p6='f'): print(p1, p2, p3, p4, p5, p6) func() # a b c d e f func(*[0, 1, 2, 3], *[4, 5]) # list func(*(0, 1, 2, 3), *(4, 5)) # tuple func(*{0, 1, 2, 3}, *{4, 5}) # set func(*frozenset({0, 1, 2, 3}), *frozenset({4, 5})) # frozenset func(*iter([0, 1, 2, 3]), *iter([4, 5])) # iterator func(*'0123', *'45') # str func(*range(4), *range(4, 6)) # range # 0 1 2 3 4 5 func(*{0:1, 2:3, 4:5, 6:7}, *{8:9, 10:11}) # dict func(*{0:1, 2:3, 4:5, 6:7}.keys(), # dict.keys() *{8:9, 10:11}.keys()) # 0 2 4 6 8 10 func(*{0:1, 2:3, 4:5, 6:7}.values(), # dict.values() *{8:9, 10:11}.values()) # 1 3 5 7 9 11 func(*{0:1, 2:3, 4:5, 6:7}.items(), # dict.items() *{8:9, 10:11}.items()) # (0, 1) (2, 3) (4, 5) (6, 7) (8, 9) (10, 11) func(*b'0123', *b'45') # bytes func(*bytearray(b'0123'), *bytearray(b'45')) # bytearray # 48 49 50 51 52 53 # list # bytes # set func(*[0, 1], *b'2', *{3, 4, 5}) # 0 1 50 3 4 5 <Iterable unpacking with func(*args)>:
def func(*args): print(args) print(*args) print(['A', 'B', *args, 'C', 'D']) func() # () # Nothing # ['A', 'B', 'C', 'D'] func(*[0, 1, 2, 3], *[4, 5]) # list func(*(0, 1, 2, 3), *(4, 5)) # tuple func(*{0, 1, 2, 3}, *{4, 5}) # set func(*frozenset({0, 1, 2, 3}), *frozenset({4, 5})) # frozenset func(*iter([0, 1, 2, 3]), *iter([4, 5])) # iterator func(*range(4), *range(4, 6)) # range # (0, 1, 2, 3, 4, 5) # 0 1 2 3 4 5 # ['A', 'B', 0, 1, 2, 3, 4, 5, 'C', 'D'] func(*{0:1, 2:3, 4:5, 6:7}, *{8:9, 10:11}) # dict func(*{0:1, 2:3, 4:5, 6:7}.keys(), # dict.keys() *{8:9, 10:11}.keys()) # (0, 2, 4, 6, 8, 10) # 0 2 4 6 8 10 # ['A', 'B', 0, 2, 4, 6, 8, 10, 'C', 'D'] func(*{0:1, 2:3, 4:5, 6:7}.values(), # dict.values() *{8:9, 10:11}.values()) # (1, 3, 5, 7, 9, 11) # 1 3 5 7 9 11 # ['A', 'B', 1, 3, 5, 7, 9, 11, 'C', 'D'] func(*{0:1, 2:3, 4:5, 6:7}.items(), # dict.items() *{8:9, 10:11}.items()) # ((0, 1), (2, 3), (4, 5), (6, 7), (8, 9), (10, 11)) # (0, 1) (2, 3) (4, 5) (6, 7) (8, 9) (10, 11) # ['A', 'B', (0, 1), (2, 3), (4, 5), (6, 7), (8, 9), (10, 11), 'C', 'D'] func(*'0123', *'45') # str # ('0', '1', '2', '3', '4', '5') # 0 1 2 3 4 5 # ['A', 'B', '0', '1', '2', '3', '4', '5', 'C', 'D'] func(*b'0123', *b'45') # bytes func(*bytearray(b'0123'), *bytearray(b'45')) # bytearray # (48, 49, 50, 51, 52, 53) # 48 49 50 51 52 53 # ['A', 'B', 48, 49, 50, 51, 52, 53, 'C', 'D'] # list # bytes # set func(*[0, 1], *b'2', *{3, 4, 5}) # (0, 1, 50, 3, 4, 5) # 0 1 50 3 4 5 # ['A', 'B', 0, 1, 50, 3, 4, 5, 'C', 'D'] <Iterable unpacking with func(p1, p2, *args)>:
def func(p1='a', p2='b', *args): print(p1, p2, args) print(p1, p2, *args) print(p1, p2, ['A', 'B', *args, 'C', 'D']) func() # a b () # a b Nothing # a b ['A', 'B', 'C', 'D'] func(*[0, 1, 2, 3], *[4, 5]) # list func(*(0, 1, 2, 3), *(4, 5)) # tuple func(*{0, 1, 2, 3}, *{4, 5}) # set func(*frozenset({0, 1, 2, 3}), *frozenset({4, 5})) # frozenset func(*iter([0, 1, 2, 3]), *iter([4, 5])) # iterator func(*range(4), *range(4, 6)) # range # 0 1 (2, 3, 4, 5) # 0 1 2 3 4 5 # 0 1 ['A', 'B', 2, 3, 4, 5, 'C', 'D'] func(*{0:1, 2:3, 4:5, 6:7}, *{8:9, 10:11}) # dict func(*{0:1, 2:3, 4:5, 6:7}.keys(), # dict.keys() *{8:9, 10:11}.keys()) # 0 2 (4, 6, 8, 10) # 0 2 4 6 8 10 # 0 2 ['A', 'B', 4, 6, 8, 10, 'C', 'D'] func(*{0:1, 2:3, 4:5, 6:7}.values(), # dict.values() *{8:9, 10:11}.values()) # 1 3 (5, 7, 9, 11) # 1 3 5 7 9 11 # 1 3 ['A', 'B', 5, 7, 9, 11, 'C', 'D'] func(*{0:1, 2:3, 4:5, 6:7}.items(), # dict.items() *{8:9, 10:11}.items()) # (0, 1) (2, 3) ((4, 5), (6, 7), (8, 9), (10, 11)) # (0, 1) (2, 3) (4, 5) (6, 7) (8, 9) (10, 11) # (0, 1) (2, 3) ['A', 'B', (4, 5), (6, 7), (8, 9), (10, 11), 'C', 'D'] func(*'0123', *'45') # str # 0 1 ('2', '3', '4', '5') # 0 1 2 3 4 5 # 0 1 ['A', 'B', '2', '3', '4', '5', 'C', 'D'] func(*b'0123', *b'45') # bytes func(*bytearray(b'0123'), *bytearray(b'45')) # bytearray # 48 49 (50, 51, 52, 53) # 48 49 50 51 52 53 # 48 49 ['A', 'B', 50, 51, 52, 53, 'C', 'D'] # list # bytes # set func(*[0, 1], *b'2', *{3, 4, 5}) # 0 1 (50, 3, 4, 5) # 0 1 50 3 4 5 # 0 1 ['A', 'B', 50, 3, 4, 5, 'C', 'D'] <Iterable unpacking with func(**kwargs)>:
def func(**kwargs): print(kwargs) print(**kwargs) func() # {} # Nothing func(*[0, 1, 2, 3], *[4, 5]) # list func(*(0, 1, 2, 3), *(4, 5)) # tuple func(*{0, 1, 2, 3}, *{4, 5}) # set func(*frozenset({0, 1, 2, 3}), *frozenset({4, 5})) # frozenset func(*iter([0, 1, 2, 3]), *iter([4, 5])) # iterator func(*range(4), *range(4, 6)) # range func(*{0:1, 2:3, 4:5, 6:7}.keys(), # dict.keys() *{8:9, 10:11}.keys()) func(*{0:1, 2:3, 4:5, 6:7}.values(), # dict.values() *{8:9, 10:11}.values()) func(*{0:1, 2:3, 4:5, 6:7}.items(), # dict.items() *{8:9, 10:11}.items()) func(*'0123', *'45') # str func(*b'0123', *b'45') # bytes func(*bytearray(b'0123'), *bytearray(b'45')) # bytearray # list # bytes # set func(*[0, 1], *b'2', *{3, 4, 5}) # TypeError: func() takes 0 positional arguments but 6 were given 
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