dict python

1import json
2
3appDict = {
4  'name': 'messenger',
5  'playstore': True,
6  'company': 'Facebook',
7  'price': 100
8}
9app_json = json.dumps(appDict)
10print(app_json)

1dict_append = {"1" : "Python", "2" : "Java"}
2dict_append.update({"3":"C++"})  # append doesn't supported in dict 
3								 # instead , use update in dict
4print(dict_append)
5# output : {'1': 'Python', '2': 'Java', '3': 'C++'}

1#Creating dictionaries
2dict1 = {'color': 'blue', 'shape': 'square', 'volume':40}
3dict2 = {'color': 'red', 'edges': 4, 'perimeter':15}
4
5#Creating new pairs and updating old ones
6dict1['area'] = 25 #{'color': 'blue', 'shape': 'square', 'volume': 40, 'area': 25}
7dict2['perimeter'] = 20 #{'color': 'red', 'edges': 4, 'perimeter': 20}
8
9#Accessing values through keys
10print(dict1['shape'])
11
12#You can also use get, which doesn't cause an exception when the key is not found
13dict1.get('false_key') #returns None
14dict1.get('false_key', "key not found") #returns the custom message that you wrote 
15
16#Deleting pairs
17dict1.pop('volume')
18
19#Merging two dictionaries
20dict1.update(dict2) #if a key exists in both, it takes the value of the second dict
21dict1 #{'color': 'red', 'shape': 'square', 'area': 25, 'edges': 4, 'perimeter': 20}
22
23#Getting only the values, keys or both (can be used in loops)
24dict1.values() #dict_values(['red', 'square', 25, 4, 20])
25dict1.keys() #dict_keys(['color', 'shape', 'area', 'edges', 'perimeter'])
26dict1.items() 
27#dict_items([('color', 'red'), ('shape', 'square'), ('area', 25), ('edges', 4), ('perimeter', 20)])

1#title			: Dictionary Example
2#author         : Joyiscold
3#date           : 2020-02-01
4#====================================================
5
6thisdict = {
7	"brand": "Ford",
8 	"model": "Mustang",
9 	"year": 1964
10}
11
12#Assigning a value
13thisdict["year"] = 2018

1#title			:Dictionary Example
2#author         :Josh Cogburn
3#date           :20191127
4#github         :https://github.com/josh-cogburn
5#====================================================
6
7thisdict = {
8	"brand": "Ford",
9 	"model": "Mustang",
10 	"year": 1964
11}
12
13#Assigning a value
14thisdict["year"] = 2018

1a = {'a': 123, 'b': 'test'}