Python Dictionary
Python Tutorial » Python Dictionary
Python dictionary is an unordered collection of elements. Each element of a dictionary has a key-value pair.
Example: Dictionaries are written using curly brackets, and it have keys and values.
Output:
{1: 'John', 2: 'Chris', 3: 'Tom', 4: 'Nick'}
my_dictionar = {1: 'John', 2: 'Chris', 3: 'Tom', 4: 'Nick'}
print(my_dictionar)
print(my_dictionar)
Output:
{1: 'John', 2: 'Chris', 3: 'Tom', 4: 'Nick'}
Python Dictionaries NOT Allow Duplicates - examples
Example: Dictionaries cannot have two items with the same key
{1: 'John', 2: 'Chris', 3: 'Tom', 4: 'Nicole'}
my_dictionar = {
1: 'John',
2: 'Chris',
3: 'Tom',
4: 'Nick',
4: 'Nicole' }
print(my_dictionar)
Output: 1: 'John',
2: 'Chris',
3: 'Tom',
4: 'Nick',
4: 'Nicole' }
print(my_dictionar)
{1: 'John', 2: 'Chris', 3: 'Tom', 4: 'Nicole'}
How to Get the Length of a Dictionary
Example: how many elements this Dictionary has, using len() function
4
my_dictionar = {
1: 'John',
2: 'Chris',
3: 'Tom',
4: 'Nick',
4: 'Nicole' }
print(len(my_dictionar))
Output:1: 'John',
2: 'Chris',
3: 'Tom',
4: 'Nick',
4: 'Nicole' }
print(len(my_dictionar))
4
Dictionary Items - Data Types
The values in dictionary elements can be any data type:
Example: elements can be any data type:
{'country': 'USA', 'make': 'Ford', 'electric': True, 'year': 1902, 'colors': ['black', 'white', 'blue']}
my_dictionar = {
"country": "USA",
"make": "Ford",
"electric": True,
"year": 1902,
"colors": ["black", "white", "blue"]
}
print(my_dictionar)
Output:"country": "USA",
"make": "Ford",
"electric": True,
"year": 1902,
"colors": ["black", "white", "blue"]
}
print(my_dictionar)
{'country': 'USA', 'make': 'Ford', 'electric': True, 'year': 1902, 'colors': ['black', 'white', 'blue']}
Python Sets methods, difference, vs lists, pop, operation, update, documentation, index, intersection, are mutable or immutable
Python Dictionary - python
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