Python dictionaries Program

Python Lab Manual / Python dictionaries Program

Program Name

Write a Python dictionaries Program.

Theory

Dictionary in Python used to store unordered collection of data values which stores mappings of unique keys to values. Dictionaries are written with curly brackets ({}), including key-value pairs separated by commas (,). A colon (:) separates each key from its value.

Program Code


#Creating an empty Dictionary  
print("Creating an empty Dictionary")
Dict1= {} 
print(Dict1)


# Dictionary with keys
print("\nDictionary with keys") 
Dict2 = {1: 'wisdom', 2:'For', 3: 'materials'}
print(Dict2) 



# Creating a Dictionary with Mixed Keys 
print("\nCreating a Dictionary with Mixed Keys") 
Dict3 = {'Name': 'wisdom', 1: [1, 2, 3, 4]} 
print(Dict3) 


# Creating a Dictionary with dict() method
print("\nCreating a Dictionary with dict() method") 
Dict4 = dict({1: 'python', 2: 'For', 3:'language'}) 
print(Dict4) 


# Creating a Dictionary with each item as a Pair
print("\nCreating a Dictionary with each item as a Pair")
Dict5 = dict([(1, 'python1'), (2, 'language1')]) 
print(Dict5)


# Delete key from Dictionary
print("\n Delete key from Dictionary")
Dict6 = {1: 'wisdom', 2:'For', 3: 'materials'}
del Dict6[1]
print(Dict6)


#print a dictionary 
print("\nprint a dictionary")
d1=dict()
for x1 in range(1,6):
	d1[x]=x1**2
print(d1)

Input and Output:
Output:
Creating an empty Dictionary
{}

Dictionary with keys
{1: 'wisdom', 2: 'For', 3: 'materials'}

Creating a Dictionary with Mixed Keys
{'Name': 'wisdom', 1: [1, 2, 3, 4]}

Creating a Dictionary with dict() method
{1: 'python', 2: 'For', 3: 'language'}

Creating a Dictionary with each item as a Pair
{1: 'python1', 2: 'language1'}

 Delete key from Dictionary
{2: 'For', 3: 'materials'}

print a dictionary
{1: 1, 2: 4, 3: 9, 4: 16, 5: 25}

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