Python json 按特定键值在列表中查找字典

Question

I was using api to get information about bus lines and got a list of dictionaries of the information.

Below are examples.

list = [{'start':'location A',
 'end':'location B',
 'routeNo':'1'},
{'start':'location C',
 'end':'location D',
 'routeNo':'2'},
{'start':'location E',
 'end':'location F',
 'routeNo':'3'}]

I am trying to get the whole dictionary of specific route by its 'routeNo'. For example I want to use '3' to get information of this route. Expected result is below.

{'start':'location E',
 'end':'location F',
 'routeNo':'3'}

The closest thing I have tried is

print(list[2])

It's no ideal because I am not searching it, I am just getting the third item in list.

So I am looking for other ways to get the result. Thanks.

Answer 1

Here is how you could search it:

def find_route(data, route_no):
    return list(filter(lambda x: x.get('rounteNo') == route_no, data))

route = find_rounte(route_list, '3')

Note i renamed list to route_list . That is because list is a built-in function and you've overwritten, which is a bad practice.

Also, assuming you are a beginner, here is a simpler to understand version:

def find_route(data, route_no):
    return [route for route in data if route.get('rounteNo') == route_no]