how to call a entries in dictionary when it is in a list?-CodePudding

So basically I have this list in code

list_names = [
    {"name":"Jullemyth","seat_number":4,"category":"Student"},
    {"name":"Leonhard","seat_number":1,"category":"OFW"},
    {"name":"Scarion","seat_number":3,"category":"Businessman"},
    {"name":"Jaguar","seat_number":2,"category":"Animal Manager"},
    {"name":"Cutiepie","seat_number":10,"category":"Streamer"},
    {"name":"Hannah Bee","seat_number":11,"category":"Streamer"}
]

I was thinking I could print only all the names by this

print(list_names[:]["name"])

but it doesn't work...how can I do that? I just want to get all the list of names in dict. Is that possible or not? without using loops.

CodePudding user response：

You can do it with a list comprehension like :

print([lst["name"] for lst in list_names])

CodePudding user response：

You cannot iterate upon all items without looping through them , the shortest way is to use list comprehension ,

for name in [D['name'] for D in list_names]:
    print(name)

CodePudding user response：

Another approach is using itemgetter from operator module

import operator

list_names = [
    {"name":"Jullemyth","seat_number":4,"category":"Student"},
    {"name":"Leonhard","seat_number":1,"category":"OFW"},
    {"name":"Scarion","seat_number":3,"category":"Businessman"},
    {"name":"Jaguar","seat_number":2,"category":"Animal Manager"},
    {"name":"Cutiepie","seat_number":10,"category":"Streamer"},
    {"name":"Hannah Bee","seat_number":11,"category":"Streamer"}
]

output_names = list(map(operator.itemgetter('name'), list_names))