Data Science Portfolio

Exception Handling

Try and Except

• Exception: a Python object representing an error
• To defend the program, suspicious code that may raise an exception can be placed in a try block
• After the try block, include an except block to handle the problem elegantly, i.e. print an error message

Try to add a string and int

try:
    # Do your main operations here
    'word' + 50
except Exception as e:
    # If an exception occurs, print an error message
    print('Error: ', e)

Error:  must be str, not int

Finally

• A finally block can be used together with try and except blocks
• It contains any code that must execute no matter what, even if an exception was raised

try:
    # Do your main operations here
    'word' + 50
except Exception as e:
    # If an exception occurs, print an error message
    print('Error: ', e)
finally:
    print('Operation finished.')

Error:  must be str, not int
Operation finished.