n = 5
d = 0
try:
n / d
except ZeroDivisionError:
print("Cannot divide by zero.")
Cannot divide by zero.
# x is not defined anywhere
try:
print(x)
except NameError:
print("Variable not defined.")
Variable not defined.
s1 = 'Word1'
s2 = 'Word2'
try:
s1/s2
except TypeError:
print("Cannot divide string.")
Cannot divide string.
# [ ] Write an expression to raise a `TypeError` exception
var1="word"
var2="throne"
try:
var1/var2
except TypeError:
print("You cannot divide strings. Words don't math.")
You cannot divide strings. Words don't math.
# [ ] Write an expression to raise an `NameError` exception
try:
print(stank)
except NameError:
print("You haven't defined the stank.")
You haven't defined the stank.
try:
5/0
except ZeroDivisionError:
print("Cannot divide by zero!")
print("Program is still running")
Cannot divide by zero!
Program is still running
n = input("Please enter a number: ")
d = input("Please enter a number: ")
try:
print(n / d)
print("print executed")
except TypeError:
print("Cannot divide strings")
except ZeroDeivisionError:
print("Cannot divide by zero!")
There’s an error in this block
Try running the app again, or contact the app’s creator
# Without handling unexpected exception
x = 5
try:
5 + "hello"
except TypeError:
print("Cannot add an integer and string together!")
There has been an error in the blocks above
Run the app again or contact app’s creator
# Handling unexpected exception
x = "5"
try:
x / 0
except ZeroDivisionError:
print("Cannot divide by zero!")
except:
print("Unexpected error")
There has been an error in the blocks above
Run the app again or contact app’s creator
n = input("Please enter a number: ")
d = input("Please enter a number: ")
try:
print(n / d)
print("print executed")
except TypeError:
print("Cannot divide strings")
except ZeroDeivisionError:
print("Cannot divide by zero!")
except Exception as exception_object:
print("Unexpected error: {0:}".format(exception_object))
print("Because of the try...except, this line runs even if an exception is thrown.")
There has been an error in the blocks above
Run the app again or contact app’s creator
# Without exception handling
from math import sqrt
x = -3
try:
sqrt(x)
There’s an error in this block
Try running the app again, or contact the app’s creator
# With exception handling
from math import sqrt
x = -3
try:
sqrt(x)
except ValueError as exception_object: # Storing the error message in exception_object
print(exception_object)
There has been an error in the blocks above
Run the app again or contact app’s creator
"""
This program tries to retrieve an integer from the user. If the user enters
something other than an integer, the program handles it by printing an error.
"""
try:
my_number = int(input("Enter an integer: "))
print("Your number: " + str(my_number))
except ValueError:
print("That wasn't an integer!")
There has been an error in the blocks above
Run the app again or contact app’s creator
# [ ] The following program adds first_name, last_initial and month and day of a birthdate.
# Find all exceptions that will be generated by this program,
# then handle the exceptions by displaying meaningful messages.
# You should also handle unexpected exceptions.
try:
first_name = input("Please enter your first name: ")
l_name = input("Please enter your last initial: ")
month = int(input("Please enter your the month of your birth 1-12: "))
day = int(input("Please enter the day of your birthdady 1-31: "))
print(first_name + l_name + string(month) + string(day) + "@gmail.com")
except NameError:
print("To cast as a string use str.")
except ValueError:
print("Cannot cast as int.")
except:
print("Unexpected error.")
finally:
print(first_name + l_name + str(month) + str(day) + "@gmail.com")
There has been an error in the blocks above
Run the app again or contact app’s creator
# [ ] The following program asks the user for their name and age.
# If the user enters an invalid value for age, the program should terminate.
# Use exception handling to deal with unexpected user input and display a meaningful message.
# Ask user for name and age.
# Enter default value for age in case they do not enter an integer
name = input("Enter your name: ")
age = -1
# Use try...except to check for a valid age
# Print name and age, using default age if user did not enter an integer
There has been an error in the blocks above
Run the app again or contact app’s creator
x = 3
y = 2
try:
print(x/y)
except ZeroDivisionError:
print("Cannot divide by zero")
else:
print("All good! No exceptions were raised.")
There has been an error in the blocks above
Run the app again or contact app’s creator
x = 3
y = 2
try:
print(x/y)
except ZeroDivisionError:
print("Cannot divide by zero")
finally:
print("Code that will run whether an exception was raised or not")
There has been an error in the blocks above
Run the app again or contact app’s creator
x = 3
y = 0
try:
print(x/y)
except ZeroDivisionError:
print("Cannot divide by zero")
finally:
print("Code that will run whether an exception was raised or not")
There has been an error in the blocks above
Run the app again or contact app’s creator
# [ ] The following program asks the user for an integer `x` then assigns `y` as the result of dividing `x` by 2.
# If the user enters an invalid value (i.e. "4.3" or "Hello"), the program terminates.
# Use exception handling to deal with unexpected user inputs, then use an `else` clause to calculate the value of `y`.
try:
x = input("Enter an integer: ")
y = None
x = int(x)
y = x / 2
except ValueError:
print("Input a whole number.")
except ZeroDivisionError:
print("Cannot divide by zero.")
except:
print("Unexpected exception.")
else:
print(y)
There has been an error in the blocks above
Run the app again or contact app’s creator
# [ ] Use the previous code and add a 'finally' clause to have the program tell the user goodbye.
try:
x = input("Enter an integer: ")
y = None
x = int(x)
y = x / 2
except ValueError:
print("Input a whole number.")
except ZeroDivisionError:
print("Cannot divide by zero.")
except:
print("Unexpected exception.")
else:
print(y)
finally:
print("Goodbye!")
There has been an error in the blocks above
Run the app again or contact app’s creator