Variables & Data Types

BeginnerPython
Python 3type()isinstance()

Objective

Understand Python data types and type conversion.

Tools & Technologies

  • Python 3
  • type()
  • isinstance()

Key Commands

type(42)
isinstance(x, int)
int('42')
str(3.14)
list(range(10))

Lab Steps

01
Primitive Types

Work with int, float, str, bool, and None.

02
Type Checking

Use type() and isinstance() for dynamic type inspection.

03
Type Conversion

Practice explicit conversion between types.

04
Mutability

Understand mutable vs immutable types and their implications.

Challenges Encountered

  • Implicit type coercion bugs (int + str TypeError)
  • Float precision issues with decimal arithmetic

Key Takeaways

  • Use Decimal module for financial calculations
  • isinstance() is preferred over type() for inheritance compatibility