Data Types - Python

Basic

• Variable/Identifier => Container that holds Data
  • varName = value => Enter a value
  • varName = "value" => String variable
  • global varName = value => Turn local variable into a global variable
• Value/Literal
  • Double Typecasting is not possible at once
• type(varName) => Returns type of variable

Data Types

• Built-in
  • Numeric
    • int => Integer
    • float => Decimal Number
    • complex
      • varName = complex(N1, N2) => Declare a complex
  • Text
    • str
      • varName = "value" => Declare a string
  • Boolean
    • varName = True => Declare a boolean
    • varName = False
  • Sequence
    • list
      • Mutable, Ordered
      • varName = [N1, "value1", varName1] => Declare a list
      • varName = [N1, [N2, N3]]
    • tuple
      • Ordered, Immutable List
      • varName = (N1, "value1", varName1) => Declare a tuple
    • set
      • Unordered, Immutable, No Duplicates
      • varName = {N1, "value1", varName1} => Declare a set
  • Map
    • dict
      • Unordered, Key-Value pair, No duplicate Keys
      • varName = {"key1": "value1", "key2": N1} => Declare a dictionary
• User-defined
  • class

Typecasting

• Types
  • Explicit
  • Implicit => Lower order data type automatically converted into higher order
• Methods
  • int()
  • float()
  • str()
  • ord()
  • hex()
  • oct()
  • tuple()
  • set()
  • list()
  • dict()