# ---------- EXCEPTION HANDLING ----------
# Exceptions are triggered either when an error occurs
# or when you want them to.

# We use exceptions are used to handle errors, execute
# specific code when code generates something out of
# the ordinary, to always execute code when something
# happens (close a file that was opened),

# When an error occurs you stop executing code and jump
# to execute other code that responds to that error

# Let's handle an IndexError exception that is
# triggered when you try to access an index in a list
# that doesn't exist

# Surround a potential exception with try
from twisted.protocols.ftp import FileNotFoundError

try:
    aList = [1, 2, 3]

    print(aList[3])

# Catch the exception with except followed by the
# exception you want to catch

# You can catch multiple exceptions by separating them
# with commas inside parentheses
# except (IndexError, NameError):
except IndexError:
    print("Sorry that index doesn't exist")

# If the exception wasn't caught above this will
# catch all others
except:
    print("An unknown error occurred")


# ---------- FINALLY & ELSE ----------
# finally is used when you always want certain code to
# execute whether an exception is raised or not

num1, num2 = input("Enter to values to divide : ").split()

try:
    quotient = int(num1) / int(num2)
    print("{} / {} = {}".format(num1, num2, quotient))

except ZeroDivisionError:
    print("You can't divide by zero")

# else is only executed if no exception was raised
else:
    print("You didn't raise an exception")

finally:
    print("I execute no matter what")