Getting Error in python SyntaxError: f-string: expressions nested too deeply

Question

I am getting this error, i also need to pass variable in that string but it is giving this error for the following code:

   for i in range (0,4):
str =f'{"requests":[{"indexName":"New_Telemart","params":"query=Mobiles&maxValuesPerFacet=10&page="{i}"&highlightPreTag=__ais-highlight__&highlightPostTag=__%2Fais-highlight__&facets=%5B%22brand_name%22%2C%22categories%22%2C%22sale_price%22%2C%22total_rating_average%22%2C%22express_delivery%22%5D&tagFilters=&facetFilters=%5B%5B%22categories%3ASmartphones%22%2C%22categories%3AMobile%20%26%20Tablets%22%5D%5D"},  {"indexName":"New_Telemart","params":"query=Mobiles&maxValuesPerFacet=10&page=0&highlightPreTag=__ais-highlight__&highlightPostTag=__%2Fais-highlight__&hitsPerPage=1&attributesToRetrieve=%5B%5D&attributesToHighlight=%5B%5D&attributesToSnippet=%5B%5D&tagFilters=&analytics=false&clickAnalytics=false&facets=categories"}]}'
print(str)

Error:

agree. this code is not read-able. Better break up

Bing Wang
– Bing Wang

2021-01-30 07:02:10 +00:00
Commented Jan 30, 2021 at 7:02 — Bing Wang
– Bing Wang, Commented Jan 30, 2021 at 7:02

Marc Dillar · Accepted Answer · 2021-01-30 07:11:44Z

7

I believe just just need to escape the curly brackets to make this work:

f'{{"requests":[{{"indexName":"New_Telemart","params":"query=Mobiles&maxValuesPerFacet=10&page="{i}"&highlightPreTag=__ais-highlight__&highlightPostTag=__%2Fais-highlight__&facets=%5B%22brand_name%22%2C%22categories%22%2C%22sale_price%22%2C%22total_rating_average%22%2C%22express_delivery%22%5D&tagFilters=&facetFilters=%5B%5B%22categories%3ASmartphones%22%2C%22categories%3AMobile%20%26%20Tablets%22%5D%5D"}},  {{"indexName":"New_Telemart","params":"query=Mobiles&maxValuesPerFacet=10&page=0&highlightPreTag=__ais-highlight__&highlightPostTag=__%2Fais-highlight__&hitsPerPage=1&attributesToRetrieve=%5B%5D&attributesToHighlight=%5B%5D&attributesToSnippet=%5B%5D&tagFilters=&analytics=false&clickAnalytics=false&facets=categories"}}]}}'

You can read the f-string documentation for more information

answered Jan 30, 2021 at 7:11

Marc Dillar

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1 Comment

Elcid Over a year ago

for those who dont get the answer like me , read this: link

WolVes · Accepted Answer · 2021-01-30 07:12:29Z

1

The error is caused by the fact that the string is including dictionaries. As the standard dictionary and f-string uses {}, you are indeed going too deep. You will need to escape the brackets or remove the dictionary from the string to effectively utilize the f-string.

answered Jan 30, 2021 at 7:12

WolVes

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