Python_G-007. List vs Tuple vs set vs dictionary

G-007_List_Tuple_Set_Dictionary.py

0.00MB

 

Feature	List	Tuple	Set	Dictionary
Syntax	using square brackets [   ]	using parentheses (   )	using curly braces {   }	using curly braces { 'key': 'value', 'key2': 'value2' }
Example	[1, 2, 3]	(1, 2, 3)	{1, 2, 3}	{'name': 'Alice', 'age': 30}
Mutability	Mutable	Immutable	Mutable	Mutable
Ordered	Yes	Yes	No	Yes
Allow Duplicates	Yes	Yes	No	Keys: No, Values: Yes
Methods	Many built-in methods  - append( item )  - remove( item )  - sort( )  - pop( index )	Few built-in methods  - count( item )  - index( item )	Many built-in methods	Many built-in methods
Use Cases	Ordered, changeable collection	Ordered, unchangeable collection	Unordered, unique collection	Key-value pairs
Performance	General-purpose	Fast read access	Fast membership testing	Fast lookups with keys

ps. lists don't directly support arithmetic operations

ex) 

a = [1, 2, 3]

b = [3, 5, 7]

c = a + b

print( c)    # output : [1, 2, 3, 3, 5, 7]

 

==> that's why we need to use NumPy.