Open a Python editor or IDE
Create a new Python file
Define functions for addition, subtraction, multiplication, and division
Use `input()` to get the first number from the user
Use `input()` to get the operator from the user
Use `input()` to get the second number from the user
Convert the input values to `float` or `int`
Use `if`, `elif`, and `else` statements to check the operator
Perform the selected calculation
Handle division by zero
Print the result
Add a loop if you want the calculator to run multiple times
Add error handling with `try` and `except`
Save the file
Run the Python script