14.1. Exceptional Handling

• In Python:

  • Syntax errors or system errors(like out of memory)=Errors

  • Logical erors=Exceptions

  • Exceptions are triggered when error occurs

  • We can handle these errors to avoid program to avoid

14.1.1. Python’s Exceptions List

Name	Description
Name error	If non existing variable is tried to be accessed
Value error	If wrong value is passed in parameters ,eg sqrt(-5)
Type error	If wrong data type is used
Key error	If non existing key is requested from dictionary
Attribute error	If .property doesn’t exist,eg obj.foo and foo doesn’t exist
Index error	If index out of datatype is tried to be accessed

14.1.2. Handling the exceptions to avoid flow/execution of code

try,catch ===> try except

# value=a/b
# This code can give errors if users gives 0 as b

try:  # always
    value=a/b
    print(value)
except ZeroDivisionError:  # if error
    print('Division error')
except:
    print('Any other generic exception')
else:  # If no error
    print('No error')

Any other generic exception