Python list problem : want to get the data only and remove the title of the field

Question

I am getting this kind of list from mongodb in python. list1 = [{'a':'1'},{'a':'2'}] I wanted to get the values of the data from this list. when i tried print(a[0]) this gave me {'a':'1'} I just wanted to get the numerical values of this list to perform other maths operations on it. but i am unable to get the numerical values. What should i do?

Answer 1

you have to iterate over list element and get the vlaue from the dictionary.

eg

new_list1 = list(map(lambda x:x['a'], list1))

or using list comprehension, as suggested by @schwobaseggl

new_list1 = [i.get('a', None) for i in list1]

Answer 2

Try print(int(list1[0]["a"]))

Answer 3

[v for d in list1 for (k,v) in d.items() ]

Output

['1', '2']