Why does Python allow commas at the end of lists and tuples?

Python allow commas at the end of lists and tuples. It is optional and makes the items more readable and you can reorder the items without getting any error. You don?t need to remember again and again to add a trailing comma after every item, if you add a comma in the end.

Let?s see some examples ?

Lists

Example

In this example, we will add a trailing comma in the List and there won?t be any error ?

# Creating a List
myList = ["Jacob", "Harry", "Mark", "Anthony", ]

# Displaying the List
print("List = ",myList)

Output

('List = ', ['Jacob', 'Harry', 'Mark', 'Anthony'])

Tuple

Example

In this example, we will add a trailing comma in the Tuple and there won?t be any error ?

# Creating a Tuple
myTuple = ("Tesla", "Audi", "Toyota",)

# Displaying the Tuple
print("Tuple = ",myTuple)

Output

('Tuple = ', ('Tesla', 'Audi', 'Toyota'))

Dictionary

Example

You can also add a trailing comma in a Dictionary ?

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

# Displaying the Dictionary
print(myprod)

# Displaying individual values
print("Product = ",myprod["Product"])
print("Model = ",myprod["Model"])
print("Units = ",myprod["Units"])
print("Available = ",myprod["Available"])

Output

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