如何在字典中找到Y等于Z的X

Question

In javascript, one can use "find" or "findIndex" to extract the object { "src": "findThis", "type": "the right one" } from

{ "results": [ 
      { "src": "findThat", "type": "not the right one" }, 
      { "src": "findThis", "type": "the right one" }
 ] 
}

How would i do this in python?

Answer 1

This is a bit unclear as to what the actual data structure looks like in Python. Based on the example as written I'm assuming you have an array of dictionaries.

data = [{"src": "findThat", "type": "not the right one" }, 
      { "src": "findThis", "type": "the right one" }]

In this case you can use a loop, but it is more "pythonic" to use a comprehension.

filtered = [a for a in data if a["src"] == "findThis"]

Or more generically,

key, value = "src", "find this"
filtered = [a for a in data if a[key] == value]

You could also use the filter function with a lambda function but adding that complexity seems unnecessary here.