how to add new value to key in dictionary python code example

Example 1: add new keys to a dictionary python

d = {'key':'value'}
print(d)
# {'key': 'value'}
d['mynewkey'] = 'mynewvalue'
print(d)
# {'mynewkey': 'mynewvalue', 'key': 'value'}

Example 2: Python dictionary append

# to add key-value pairs to a dictionary:

d1 = {
	"1" : 1,
	"2" : 2,
  	"3" : 3
} # Define the dictionary

d1["4"] = 4 # Add key-value pair "4" is key and 4 is value

print(d1) # will return updated dictionary

Example 3: Python dictionary append

testing1={'one':1,'two':2}
''' update() is the method of dict() merges another dict into existing ones '''
''' it replaces the keys of exisiting ones with the the new ones '''
testing1.update({'two':3,'noice':69}) 
print(testing1) """ {'one':1,'two':3,'noice':69} """

Example 4: add values to dictionary key python

key = "somekey"
a.setdefault(key, [])
a[key].append(2)