Dictionary Methods in Python | Set 1 (cmp(), len(), items()...)

Python Dictionary Basics have been discussed in the article below

Some dictionary methods are discussed in this article.

1. str(dic) :- This method is used to return the string, denoting all the dictionary keys with their values.

2. items() :- This method is used to return the list with all dictionary keys with values.

# Python code to demonstrate working of 
# str() and items() 
  
# Initializing dictionary 
dic = { 'Name' : 'Nandini', 'Age' : 19 } 
  
# using str() to display dic as string 
print ("The constituents of dictionary as string are : ") 
print (str(dic)) 
  
# using str() to display dic as list 
print ("The constituents of dictionary as list are : ") 
print (dic.items()) 

Output:

The constituents of dictionary as string are : 
{'Name': 'Nandini', 'Age': 19}
The constituents of dictionary as list are : 
dict_items([('Name', 'Nandini'), ('Age', 19)])

3. len() :- It returns the count of key entities of the dictionary elements.

4. type() :- This function returns the data type of the argument.

# Python code to demonstrate working of 
# len() and type() 
  
# Initializing dictionary 
dic = { 'Name' : 'Nandini', 'Age' : 19, 'ID' : 2541997 } 
  
# Initializing list 
li = [ 1, 3, 5, 6 ] 
  
# using len() to display dic size 
print ("The size of dic is : ",end="") 
print (len(dic)) 
  
# using type() to display data type 
print ("The data type of dic is : ",end="") 
print (type(dic)) 
  
# using type() to display data type 
print ("The data type of li is : ",end="") 
print (type(li)) 

Output:

The size of dic is : 3
The data type of dic is : 
The data type of li is :

5. copy() :- This function creates the shallow copy of the dictionary into other dictionary.

6. clear() :- This function is used to clear the dictionary contents.

# Python code to demonstrate working of 
# clear() and copy() 
  
# Initializing dictionary 
dic1 = { 'Name' : 'Nandini', 'Age' : 19 } 
  
# Initializing dictionary  
dic3 = {} 
  
# using copy() to make shallow copy of dictionary 
dic3 = dic1.copy() 
  
# printing new dictionary 
print ("The new copied dictionary is : ") 
print (dic3.items()) 
  
# clearing the dictionary 
dic1.clear() 
  
# printing cleared dictionary 
print ("The contents of deleted dictionary is : ",end="") 
print (dic1.items()) 

Output:

The new copied dictionary is : 
dict_items([('Age', 19), ('Name', 'Nandini')])
The contents of deleted dictionary is : dict_items([])

This article is contributed by Manjeet Singh. If you like GeeksforGeeks and would like to contribute, you can also write an article using contribute.geeksforgeeks.org or mail your article to contribute@geeksforgeeks.org. See your article appearing on the GeeksforGeeks main page and help other Geeks.

Please write comments if you find anything incorrect, or you want to share more information about the topic discussed above.

My Personal Notes

Dictionary Methods in Python | Set 1 (cmp(), len(), items()…)

Recommended Posts: