Struggling with a challenge

Question

I was given two lists :

list1 = ["A","B","C","D","E","F",1,"G",3,"H","I","J","K","L"]
list2 = [20 ,27 ,"Arm","Leg",13 ,24 ,"Head",75 ,64 ,71 ,"Ankle", 82 ,45 ,23 ]

Using the shortest code possible, I need to create a dictionary (dictChallenge) containing only the letter from list1 and only the numbers from list2.

The output of print(dictChallenge) is:

{'A': 20, 'B': 27, 'E': 13, 'F': 24, 'G': 75, 'H': 71, 'J': 82, 'K': 45, 'L': 23 }

hint: iterate through both lists at the same time (read about `zip`) and then go from there. — acushner, Jun 23 '21 at 02:38
Does this answer your question? [How do I convert two lists into a dictionary?](https://stackoverflow.com/questions/209840/how-do-i-convert-two-lists-into-a-dictionary) — DarrylG, Jun 23 '21 at 02:42
The challenge is obviously designed to get you to think about the subproblems within the problem, and it's obvious you haven't done that yet or your question would be more specific. — Mark Ransom, Jun 23 '21 at 02:44
Would you please explain what do you mean by *shortest code possible*? — ThePyGuy, Jun 23 '21 at 02:48
`C` is certainly a letter -- why isn't it in the expected output? — John Gordon, Jun 23 '21 at 02:53

score 1 · Answer 1 · answered Jun 23 '21 at 02:43

You can zip the two lists together and then filter that list based on your conditions. You can then use that list in a dict comprehension or pass it to dict():

list1 = ["A","B","C","D","E","F",1,"G",3,"H","I","J","K","L"]
list2 = [20 ,27 ,"Arm","Leg",13 ,24 ,"Head",75 ,64 ,71 ,"Ankle", 82 ,45 ,23 ]

{k: v for k, v in zip(list1, list2) if isinstance(k, str) and isinstance(v, int)}

Which gives you:

{'A': 20,
 'B': 27,
 'E': 13,
 'F': 24,
 'G': 75,
 'H': 71,
 'J': 82,
 'K': 45,
 'L': 23}

score 0 · Answer 2 · answered Jun 23 '21 at 02:42

0

You could use zip and isinstance to check if it is and integer or a string.

dict1={}
for i,j in zip(list1,list2):
    if isinstance(j,int) and isinstance(i,str):
        dict1[i]=j
print(dict1)

answered Jun 23 '21 at 02:42

score 0 · Answer 3 · answered Jun 23 '21 at 02:50

list1 = ["A","B","C","D","E","F",1,"G",3,"H","I","J","K","L"]
list2 = [20 ,27 ,"Arm","Leg",13 ,24 ,"Head",75 ,64 ,71 ,"Ankle", 82 ,45 ,23 ]
keys = [L for L in list1 if type(L)==str]
values = [d for d in list2 if type(d) ==int]
DictChallenge = dict(zip(keys,values))
print(DictChallenge)

Struggling with a challenge

3 Answers3