一文带你深入理解Python中zip的用法

zip(*iterables)

names = ['Alice', 'Bob', 'Charlie']
ages = [25, 30, 35]
zipped = zip(names, ages)
print(list(zipped)) 
# 输出：[('Alice', 25), ('Bob', 30), ('Charlie', 35)]

zipped_data = [('a', 1), ('b', 2), ('c', 3)]
letters, numbers = zip(*zipped_data)
print(letters)  # ('a', 'b', 'c')
print(numbers)  # (1, 2, 3)

from itertools import zip_longest
a = [1, 2, 3]
b = ['a', 'b']
print(list(zip_longest(a, b, fillvalue='N/A')))
# 输出：[(1, 'a'), (2, 'b'), (3, 'N/A')]

matrix = [[1, 2, 3],
          [4, 5, 6]]
transposed = list(zip(*matrix))
print(transposed)  # [(1, 4), (2, 5), (3, 6)]

keys = ['name', 'age', 'city']
values = ['Alice', 30, 'New York']
person_dict = dict(zip(keys, values))
print(person_dict) 
# {'name': 'Alice', 'age': 30, 'city': 'New York'}

data = [1, 2, 3, 4, 5, 6]
groups = zip(data[::2], data[1::2])
print(list(groups))  # [(1, 2), (3, 4), (5, 6)]

names = ['Alice', 'Bob']
scores = [95, 80, 75]
for i, (name, score) in enumerate(zip(names, scores)):
    print(f"{i}: {name} scored {score}")

print(list(zip())))  # 输出：[]

# 使用zip实现加法
sums = [x + y for x, y in zip([1,2,3], [4,5,6])]

# 等效map实现
sums = list(map(lambda x, y: x+y, [1,2,3], [4,5,6]))

from itertools import islice
def sliding_window(iterable, n):
    it = iter(iterable)
    return zip(*[islice(it, i, None) for i in range(n)])