两全列表相加

1.
import numpy as np
a = np.array([1,2,3,4])
b = np.array([7,8,9,10])
s = a + b
print(s)

[ 8 10 12 14]

2.

from itertools import product
a = [2, 3, 4, 5]
b = [7, 8, 9]

ret2 = [i+j for i, j in product(a, b)]
print(sorted(set(ret2)))

"""
[9, 10, 11, 12, 13, 14]
"""
3.
a = [2, 3, 4, 5]
b = [7, 8, 9]
ret = list(set([i + j for i in a for j in b]))

print(ret)

"""
[9, 10, 11, 12, 13, 14]
"""

4.

a = [2, 3, 4, 5]
b = [6,7, 8,9]
ret2 = [i+j for i, j in zip(a, b)]

print(ret2)

"""
[8, 10, 12, 14]
"""

a = [2, 3, 4, 5]
b = [6,7, 8]
ret2 = [i+j for i, j in zip(a, b)]

print(ret2)

"""
[8, 10, 12]
"""

for i in zip([1,2,3], [‘a‘,‘b‘, ‘c‘]):
    print (i)

"""
(1, ‘a‘)
(2, ‘b‘)
(3, ‘c‘)
"""

from itertools import starmap

values = [[0,5], [1,6], [2,7], [3,8]]

for i in starmap(lambda x, y:(x, y, x+y), values):
    print (‘%d * %d = %d‘ % i)

"""
0 * 5 = 5
1 * 6 = 7
2 * 7 = 9
3 * 8 = 11

"""