Write a program in Python to handle user defined exception for given problem
Python has many built-in exceptions which forces your program to output an error
when something in it goes wrong. However, sometimes you may need to create
custom exceptions that serves your purpose.
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| Write a program in Python to handle user defined exception |
ZeroDivisionError: Occurs when a number is divided by zero.
#totalprogrammingcode
NameError: It occurs when a name is not found. It may be local or global.
IndentationError: If incorrect indentation is given.
IOError: It occurs when Input Output operation fails.
EOFError: It occurs when the end of the file is reached, and yet operations are
being performed.
In Python, users can define such exceptions by creating a new class. This exception
class has to be derived, either directly or indirectly, from Exception class. Most of the
built-in exceptions are also derived from this class.
Example:
def input_age(age):
try:
assert int(age) > 18
except ValueError:
return 'ValueError: Insert integer value'
else:
return 'You are Adult'
output:
>>> print(input_age(25))
You are Adult
>>> print(input_age('abc'))
ValueError: Insert integer value
Exception handling in Python
If the Python program contains suspicious code that may throw the exception, we must
place that code in the try block. The try block must be followed with the except
statement which contains a block of code that will be executed if there is some
exception in the try block.
Example:
try:
a = int(input("Enter a:"))
b = int(input("Enter b:"))
c = a/b;
print("a/b = %d"%c)
except Exception:
print("can't divide by zero")
else:
print("Hi I am else block")
Output:
Enter a:10
Enter b:0
can't divide by zero
Example
1. Write a Python program to Check for ZeroDivisionError Exception
a = int(input("Enter first number : "))
b = int(input("Enter second number : "))
try :
c = a/b
except ZeroDivisionError :
print("\nZero Division Error Occured")
password = input("Enter Password : ")
try :
if(password != "chetandagajipatil333") :
raise Exception("Incorrect Password")
else :
print("Correct Password")
except :
raise
