access the element in list of dictionary in python

Question

hi every one i have list of dictionary all of the dictionaries like this:

 dict1 = {Label:----,Chapter:----,Section:----,Massage:----}
 dict2 = {Label:----,Chapter:----,Section:----,Massage:----}
 dict3 = {Label:----,Chapter:----,Section:----,Massage:----}
 List = [dict1 , dict2 , dict3]

i want first the all dictionaries of list if the my label is equal with label in dictionary print the massage of that dictionary.

i use this method but it get nothing.

def printMassage(List , mylabel):
    for dicts in List:
        if (Label.value == mylabel):
            print( Massage.value)

please help me!!

Answer 1

How dictionary in python works

value = dictionary[key]  # get the `value` of `key` in `dictionary`.
dictionary[key] = newvalue  # change the content of `key` in `dictionary` to `newvalue`.

Your example

def printMassage(List , mylabel):
    for dict in List:
        if (dict["Label"] == mylabel):
            print(dict["Massage"])

Answer 2

def printMassage(List , mylabel):
    for dicts in List:
        if dicts[Label] == mylabel:
            print(dicts[Massage])

Answer 3

When accessing values in dictionaries, you need to use the key as the lookup:

def printMassage(List , mylabel):
    for d in List:
        if d['Label'] == mylabel:
            print(d['Massage'])

A one-liner:

def printMassage(List , mylabel):
    print([d['Massage'] for d in List if d[Label] == mylabel])