###### exception ######

print('---------- exception 1 --------------')

# First run, try entering 3 in the console
#   Notice pop(value) looks for key '3' (input() results in string)
#   in the dict, return the value associated with the key,
#   and remove that key-value pair from the dict.
#   The appearance of console shows
#      {0: 'cat', 3: 'dog'}   -- why?
# Now, let's run this exception 1 again and enter 5 in the console
#   Observe the appearance of console shows
#      key is not found!  -- why?

x = input('give me a key to remove item from my dict : ')
try:
    d = {}
    d[0] = "cat"
    d[3] = "dog"
    d["3"] = "bird"

    d.pop(x)
    print(d)

except ZeroDivisionError:
    print('divide by zero')
except TypeError:
    print("type mismatch!")
except IndexError:
    print("index out of bound!")
except KeyError:
    print("key is not found!")
except:
    print("caught")

###########################

print('---------- exception 2 --------------')

x = input('give me a denominator : ')      # try enter 0 in the console
try:
    d = {}
    d[0] = "cat"
    d[3] = "dog"
    d["3"] = "bird"
    d['4'] = 5
    print(d['4'] / int(x))

except ZeroDivisionError:
    print('divide by zero')
except TypeError:
    print("type mismatch!")
except IndexError:
    print("index out of bound!")
except KeyError:
    print("key is not found!")
except:
    print("caught")

###########################

print('---------- exception 3 --------------')

x = input('give me a denominator : ')      # try enter some number
try:
    d = {}
    d[0] = "cat"
    d[3] = "dog"
    d["3"] = "bird"
    d['4'] = '5'
    print(d['4'] / int(x))

except ZeroDivisionError:
    print('divide by zero')
except TypeError:
    print("type mismatch!")
except IndexError:
    print("index out of bound!")
except KeyError:
    print("key is not found!")
except:
    print("caught")