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([])
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