[Python tutorial] 3. Data types

Built-in Data Types

• Text Type: str
• Numeric Types: int, float, complex
• Sequence Types: list, tuple, range
• Mapping Type: dict
• Set Types: set, frozenset
• Boolean Type: bool
• Binary Types: bytes, bytearray, memoryview
• None Type: NoneType

Collections (Arrays)

• List: ordered, changeable, Allows duplicate members
• Tuple: ordered, unchangeable, Allows duplicate members
• Set: unordered, unchangeable(possible to remove/add), unindexed, No duplicate members
• Dictionary: ordered, changeable, No duplicate members

Getting the Data Type: type()

x = 5
print(type(x)) # <class 'int'>

Setting the Data Type

myStr = "Hello World" # str
myInt = 20 # int
myFloat = 20.5 # flaot
myComplex = 1j # Complex
myList = ["apple", "banana", "cherry"] # list
myTuple = ("apple", "banana", "cherry") # tuple
myRange = range(6) # range
myDict = {"name" : "John", "age" : 36} # dict
mySet = {"apple", "banana", "cherry"} # set
myFrozenset = frozenset({"apple", "banana", "cherry"}) # frozenset()
myBool = True # bool
myBytes = b"Hello" # bytes
myBytearray = bytearray(5) # bytearray()
myMemoryview = memoryview(bytes(5)) # memoryview
myNone = None # NoneType

Setting the Specific Data Type

myStr = str("Hello World")
myInt = int(20)
myFloat = float(20.5)
myComplex = complex(1j) # complex
myList = list(("apple", "banana", "cherry")) # list, (())
myTuple = tuple(("apple", "banana", "cherry")) # tuple, (())
myRange = range(6) # range
myDict = dict(name="John", age=36) # dict
mySet = set(("apple", "banana", "cherry")) # set
myBool = bool(5) # bool
myBytes = bytes(5) # bytes