CODEWITHSUNDEEP
python
Chandrakanth
Chandrakanth

Reputation: 25

Pair with each value from first list with second list

I need to write loop for each value of the first list should to paired with each value of second list 

list_1 = [1,2,3,4,5]
list_2 = [100,101,102]

for x in list_1:
    for y in list_2:
        pair_list =

expected output is [[1,100],[1,1001],[1,102],[2,100]....

Upvotes: 0

Views: 45

Answers (2)

Leo Arad
Leo Arad

Reputation: 4472

You can try

list_1 = [1,2,3,4,5]
list_2 = [100,101,102]

print([[y, x] for y in list_1 for x in list_2])

Or

pair_list = []
for x in list_1:
    for y in list_2:
        pair_list.append([x,y])
print(pair_list)

Output

[[1, 100], [1, 101], [1, 102], [2, 100], [2, 101], [2, 102], [3, 100], [3, 101], [3, 102], [4, 100], [4, 101], [4, 102], [5, 100], [5, 101], [5, 102]]

This nested list comprehension will return a list of each combination between values in list_1 and list_2

Upvotes: 0

Cory Kramer
Cory Kramer

Reputation: 117856

You can use itertools.product

>>> from itertools import product
>>> list(product(list_1, list_2))
[(1, 100), (1, 101), (1, 102), (2, 100), (2, 101), (2, 102), (3, 100), (3, 101), (3, 102), (4, 100), (4, 101), (4, 102), (5, 100), (5, 101), (5, 102)]

Or if you want a list of lists, you can do something similar with a list comprehension

>>> [list(i) for i in product(list_1, list_2)]
[[1, 100], [1, 101], [1, 102], [2, 100], [2, 101], [2, 102], [3, 100], [3, 101], [3, 102], [4, 100], [4, 101], [4, 102], [5, 100], [5, 101], [5, 102]]

Upvotes: 1

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