Python 词典 如何创建列表项的组合？

Question

I have a dictionary which has value as a list.

thisdict = {  'G1' : [10,20],
              'G2' : [12,13]

}

I want to create new dictionary with all possible 4 combinations.

C1:[10,12]

C2:[10,13]

C3:[20,12]

C4:[20,13]

How do I create that?

Answer 1

I think you are looking for: itertools.combinations()

This might help too Getting all combinations of key/value pairs in Python dict

Answer 2

Is this acceptable?

from itertools import product

d = {}
offset = 1
for e in product(thisdict['G1'], thisdict['G2']):
    d[f'C{offset}'] = list(e)
    offset += 1
print(d)

Output:

{'C1': [10, 12], 'C2': [10, 13], 'C3': [20, 12], 'C4': [20, 13]}

Answer 3

As other stated, you can use itertools.product for this.

But you have just two lists, you can also just use two for loops:

> d = { f'C{i+1}': {'G1':g1e, 'G2':g2e}
      for i, (g1e, g2e) in
      enumerate((g1e, g2e) for g1e in thisdict['G1']
                           for g2e in thisdict['G2']) }
> d
{'C1': {'G1': 10, 'G2': 12},
 'C2': {'G1': 10, 'G2': 13},
 'C3': {'G1': 20, 'G2': 12},
 'C4': {'G1': 20, 'G2': 13}}

NB: I used the format requested in the comment to another answer.