为什么Python允许在列表和元组的末尾使用逗号？

# Creating a ListmyList = ["Jacob", "Harry", "Mark", "Anthony", ]# Displaying the Listprint("List = ",myList)

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

# Creating a TuplemyTuple = ("Tesla", "Audi", "Toyota",)# Displaying the Tupleprint("Tuple = ",myTuple)

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

# Creating a Dictionary with 4 key-value pairsmyprod = {   "Product":"Mobile",   "Model": "XUT",   "Units": 120,   "Available": "Yes",}# Displaying the Dictionaryprint(myprod)# Displaying individual valuesprint("Product = ",myprod["Product"])print("Model = ",myprod["Model"])print("Units = ",myprod["Units"])print("Available = ",myprod["Available"])

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