Pair Generation from nested dictionaries with real values-CodePudding

I have an input dictionary like this

dict1= {'AM': ['tv', 'rs', 'pq', 'MN', 'tN', 'tq', 'OP', 'tP', 'QR', 'tr'],
    'BR': ['tv', 'rs', 'pq', 'MN', 'tN', 'tq', 'OP', 'tP', 'QR', 'tr']}

Two other dictionaries in which I want to search are

dict2_1={'AM':{'pq':1.2,'rs':2.41,'tv':3.81},'BR':{'MN':1.3,'OP':1.41,'QR':1.81}}
dict3_1={'AM':{'tq':1.3,'rs':1.41,'tv':2.41},'BR':{'tN':1.8,'tP':1.81,'tr':1.42}}

Expected Output

{'AM-tv': (3.81,2.41),
 'AM-rs': (2.41,1.41),
 'AM-pq': (1.2,'insert'),
 'AM-MN': ('insert','insert'),
 'AM-tN': ('insert','insert'),
 'AM-tq': ('insert',1.3),
 'AM-OP': ('insert','insert'),
 'AM-tP': ('insert','insert'),
 'AM-QR': ('insert','insert'),
 'AM-tr': ('insert','insert'),
 'BR-tv': ('insert','insert'),
 'BR-rs': ('insert','insert'),
 'BR-pq': ('insert','insert'),
 'BR-MN': (1.3,'insert'),
 'BR-tN': ('insert',1.8),
 'BR-tq': ('insert','insert'),
 'BR-OP': (1.41,'insert'),
 'BR-tP': ('insert',1.81),
 'BR-QR': (1.81,'insert'),
 'BR-tr': ('insert',1.42)}

In the output, there is a need to generate pairs of dict1. if the values of dict1 are present within the inner nested dictionary keys of dict2_1 or dict2_2 then it will replace with the inner nested dictionary values otherwise it will replace it with 'insert'. Is there any way to do it?

CodePudding user response：

You could use dict.get to set a default value if a key doesn't exist in a dict (in this case "insert"):

out = {}
for k, lst in dict1.items():
    for v in lst:
        out[f"{k}-{v}"] = (dict2_1[k].get(v, 'insert'), dict3_1[k].get(v, 'insert'))

The above code can also be written as a dict comprehension:

out = {f"{k}-{v}": (dict2_1[k].get(v, 'insert'), dict3_1[k].get(v, 'insert')) for k, lst in dict1.items() for v in lst}

Output:

{'AM-tv': (3.81, 2.41),
 'AM-rs': (2.41, 1.41),
 'AM-pq': (1.2, 'insert'),
 'AM-MN': ('insert', 'insert'),
 'AM-tN': ('insert', 'insert'),
 'AM-tq': ('insert', 1.3),
 'AM-OP': ('insert', 'insert'),
 'AM-tP': ('insert', 'insert'),
 'AM-QR': ('insert', 'insert'),
 'AM-tr': ('insert', 'insert'),
 'BR-tv': ('insert', 'insert'),
 'BR-rs': ('insert', 'insert'),
 'BR-pq': ('insert', 'insert'),
 'BR-MN': (1.3, 'insert'),
 'BR-tN': ('insert', 1.8),
 'BR-tq': ('insert', 'insert'),
 'BR-OP': (1.41, 'insert'),
 'BR-tP': ('insert', 1.81),
 'BR-QR': (1.81, 'insert'),
 'BR-tr': ('insert', 1.42)}