从 2 个字典创建嵌套字典

Question

I have 2 dictionaries that I created and need to now try to combine those. I have searched for days now try to find something similar to this but the examples I see aren't quite doing what I am looking for and/or are not working for me and I don't know what I may be missing or if something is wrong with my dictionaries. Can I get some advice?

Examples of the dics I have:

pro_go: {
    Q9Y7X7 : ['GO:0003674','GO:0005829'...],  
    'Q9Y819': ['GO:0008150','GO:0005794',...]...
}
go_def: {
    'GO:0010332': 'response to gamma radiation', 
    'GO:0010337': 'cellulose synthase', ...
}

What I need to continue on with my project:

pro_go_def: {
    Q9Y7X7: {
        'GO:xxxxxx': response, 
        'GO:xxxxxx': metabolism...
    }, 
    Q9Y819:{
        'GO:xxxxx': cell wall, 
        'GO:xxxxx': 'transporter activity',
    } ....
}

So I need a dictionary pro_go key, pro_go value=go_def key, go_def value

I have to keep it basic and not use any other packages(?) like panda or collections that I seen in some of the examples. And I'd love any explanations that you may give, I really want to understand whats going on and really am lost with Python at this point.

Answer 1

Something like this?

pro_go_def = {
    k: {elem: go_def[elem] for elem in v if elem in go_def}
    for k, v in pro_go.items()
}

Answer 2

from collections import ChainMap

dict1 = {'name': 'Jack', 'age':22} 
dict2 = {'gender':'male'}

dict_common = ChainMap(dict1,dict2)



 for i in dict_common.keys():
        print(i)

Result

gender name age