python tutorial - Dictionary Python | Dictionary Methods in Python | cmp(), len(), items()… - learn python - python programming




 dictionary python

Learn Python - Python tutorial - dictionary python - Python examples - Python programs

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

python accessing elements of a dictionary

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

python - Sample - python code :

# 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())

python tutorial - 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.

accessing elements of a dictionary python

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

python - Sample - python code :

# 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))

python tutorial - 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 - Sample - python code :

# 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())

python tutorial - Output :

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

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