errors.md

Errors

Reference:

• https://docs.python.org/3/library/exceptions.html#bltin-exceptions
• https://docs.python.org/3/tutorial/errors.html

Raising Errors

You can use the raise keyword to stop program execution if a certain condition is met.

options = ["rock", "paper", "scissors"]

choice = input("Please choose either 'rock', 'paper', or 'scissors': ")

if choice in options:
    print("YOU CHOSE", choice)
else:
    raise ValueError("OOPS - Please type 'rock', or 'paper', or 'scissors' (without using using quotation marks).")

Handling Errors

You can use a try... except block to handle errors, whether encountered naturally or triggered intentionally:

try:
  raise RuntimeError("Hello")
  print("EVERYTHING IS GOING FINE")
except RuntimeError:
  print("OOPS - MY ERROR")

#> OOPS - MY ERROR

try:
  100 / 0
  print("EVERYTHING IS GOING FINE")
except DivisionByZeroError:
  print("OOPS - MY ERROR")

#> OOPS - MY ERROR