What is correct syntax to create Python dictionary?

The correct syntax to create a Python Dictionary is storing values in the form of key:value pairs. On the left of colon, we store keys and on the right, values i.e.

key:value

Dictionary is enclosed by curly bracket and do not allow duplicates. According to the 3.7 Python update, dictionaries are now ordered. Consider Dictionary as a set of key: value pairs, with the requirement that the keys are unique (within one dictionary). Each key in a Dictionary is separated from its value by a colon (:), the items are separated by commas, and the whole thing is enclosed in curly braces.

Create a Dictionary in Python with 4 key-value pairs

We will create 4 key-value pairs, with keys Product, Model, Units and Available and values Mobile, XUT, 120 and Yes. Keys are on the left of colon, whereas values are on the right −

Example

# Creating a Dictionary with 4 key-value pairs
myprod = {
	"Product":"Mobile",
	"Model": "XUT",
	"Units": 120,
	"Available": "Yes"
}

# Displaying the Dictionary
print("Dictionary = \n",myprod)

Output

Dictionary =
 {'Product': 'Mobile', 'Model': 'XUT', 'Units': 120, 'Available': 'Yes'}

Above, we have displayed product details in the form of Dictionaries with 4 key-value pairs.

Create a Dictionary in Python with 5 key-value pairs

We will create 5 key-value pairs, with keys Product, Model, Units, Available, Grades and values Mobile, XUT, 120, Yes, “A” −

Example

# Creating a Dictionary with 5 key-value pairs
myprod = {
	"Product":"Mobile",
	"Model": "XUT",
	"Units": 120,
	"Available": "Yes",
	"Grades": "A"
}

# Displaying the Dictionary
print("Dictionary = \n",myprod)

Output

Dictionary =
 {'Product': 'Mobile', 'Model': 'XUT', 'Units': 120, 'Available': 'Yes', 'Grades': 'A'}

Above, we have displayed product details in the form of Dictionaries with 5 key-value pairs.

Create a Dictionary in Python using the dict() method

We can also create a Dictionary using a Built-in method dict(). We have set the key:value pairs in the method itself −

Example

# Creating a Dictionary using the dict() method
myprod = dict({
	"Product":"Mobile",
	"Model": "XUT",
	"Units": 120,
	"Available": "Yes"
})

# Displaying the Dictionary
print("Dictionary = \n",myprod)

# Display the Keys
print("\nKeys = ",myprod.keys())

# Display the Values
print("Values = ",myprod.values())

Output

Dictionary = 
 {'Product': 'Mobile', 'Model': 'XUT', 'Units': 120, 'Available': 'Yes'}

Keys =  dict_keys(['Product', 'Model', 'Units', 'Available'])
Values =  dict_values(['Mobile', 'XUT', 120, 'Yes'])

AmitDiwan

Updated on: 11-Aug-2022

2K+ Views

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