CODEWITHSUNDEEP
python-3.xformatunpack
Jiho Choi
Jiho Choi

Reputation: 1311

python3 nested dictionary unpack for format string

I am trying to pass a dictionary (loaded from JSON file) to format string. While single key-value unpack works correctly, I am not sure how I can access the nested keys (children) with a format string.

Or is there any other better way to pass JSON to string format?

config = {
    "TEST": "TEST",
    "TEST1": "TEST1",
    "TEST2": {
        "TEST21": "TEST21"
    }
}

query_1 = """
    {TEST} {TEST1}
"""
query_2 = """
    {TEST} {TEST1}
    {TEST2.TEST21}
"""

print(query_1.format( **config ))  # WORKING
print(query_2.format( **config ))  # NOT WORKING

Upvotes: 1

Views: 180

Answers (2)

buran
buran

Reputation: 14218

Using f-string

config = {
    "TEST": "TEST",
    "TEST1": "TEST1",
    "TEST2": {
        "TEST21": "TEST21"
    }
}

query_2 = f"""
    {config['TEST']} {config['TEST1']}
    {config['TEST2']['TEST21']}
"""

print(query_2)

Note, if query is sql query, there is probably better way to do what you do, not using string formatting

Upvotes: 1

Chetan Ameta
Chetan Ameta

Reputation: 7896

In your query_2 change {TEST2.TEST21} to {TEST2[TEST21]} it will work.

Ex.

query_2 = """
    {TEST} {TEST1}
    {TEST2[TEST21]}
"""
print(query_2.format(**config))

Output

TEST TEST1
TEST21

Upvotes: 1

Related Questions