在 python SyntaxError 中出现错误：f-string：表达式嵌套太深答案

【问题标题】：Getting Error in python SyntaxError: f-string: expressions nested too deeply在 python SyntaxError 中出现错误：f-string：表达式嵌套太深
【发布时间】：2021-01-30 06:55:17
【问题描述】：

我收到此错误，我还需要在该字符串中传递变量，但它为以下代码给出此错误：

   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)

错误：

【问题讨论】：

同意。此代码不可读。分手更好

标签： python python-3.x string syntax

【解决方案1】：

我相信只需要转义大括号即可完成这项工作：

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"}}]}}'

您可以阅读f-string documentation了解更多信息

【讨论】：

【解决方案2】：

错误是由字符串包含字典引起的。由于标准字典和 f-string 使用 {}，您确实走得太深了。您需要转义括号或从字符串中删除字典以有效利用 f 字符串。

【讨论】：