CODEWITHSUNDEEP
pythondictionarynested
ShikharDua
ShikharDua

Reputation: 10009

String formatting of nested python dictionary

I have a dictionary that prints well

print(
    """{ASSET_EDGE_CONFIG[EndAdvertiserAdAccounts][hive_data_features][rev_28d]}""".format(**locals())
)

But I want to parametrize 'EndAdvertiserAdAccounts' key to something like below

EDGE = 'EndAdvertiserAdAccounts'
print(
    """{ASSET_EDGE_CONFIG[{EDGE}][hive_data_features][rev_28d]}""".format(**locals())
)

above code gives me following error: 

KeyError: '{EDGE}'

I guessing there is a particular way to formatting dict using format function. Any help is appreciated here

Upvotes: 0

Views: 238

Answers (1)

CrazyCasta
CrazyCasta

Reputation: 28302

What you're asking for is not possible with the string format function. As Ming points out you're using string format in a very odd way. The specification for string format is here. What you're asking about is basically the element_index specification which says the stuff inside the square braces has to either be an integer or string constant. Your example would try to do `ASSERT_EDGE_CONFIG["{EDGE}"]...

If this is all you're trying to do then the following would make better sense:

print ASSET_EDGE_CONFIG[EDGE]["hive_data_features"]["rev_28d"]

Assuming the more likely case that you're trying to do something more interesting it would be worth giving a more complicated example to show us why you want to use string format.

If you really wanted I guess you could do (requires two format calls):

EDGE = 'EndAdvertiserAdAccounts'
print(
    """{{ASSET_EDGE_CONFIG[{EDGE}][hive_data_features][rev_28d]}}""".format(**locals()).format(**locals())
)

Upvotes: 2

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