Division by 0 is not possible

Handling specific exceptions

We can also define the type of exception to be handled by the except statement. If we don’t specify any exception, it would handle every type of exception that would occur in the try block and would execute the print statement within it which is not a good practice

Hence from the above example, the proper code would look as follows:

try:
    a=12/0;
    print(a);
except ZeroDivisionError:
    print("Division by 0 not possible");

A try statement can have any number of except statements to handle different exceptions but only one would be executed when an exception would occur. For example,

Code:

a=[1,2,3,4,5];
try:
    print(a[0]/0);
except ZeroDivisionError:
    print("Division by 0 is not possible");
except IndexError:
    print("Index out of bounds");

Output: Division by 0 is not possible

In the above example, we created an array and tried dividing the first element with 0, hence the ZeroDivisionError exception was raised and handled by printing a message Division by 0 not possible in the shell. In the same code if we try to access the element present at the index which is not in the range of i.e. a[7], then the IndexError exception would be raised and handled by printing a message Index out of bounds in the shell.

else clause

What if an exception doesn’t occur, then one would want to run some other lines of code. To do this, python has a built-in clause known as the else clause. For example,

Code:

n = int(input("Enter a number: "));
try:
  assert n % 2 == 0;
except:
  print("Odd Number");
else :
  print("Even Number");

Output:

Enter a number: 2

Even Number

Enter a number: 1

Odd Number

In the above code, we are checking for even and odd numbers. If we find the given number is odd, then the assert statement would produce an exception and hence except clause would handle it and print Odd Number otherwise it would come under the else clause and would print Even Number.

Finally clause

Very similar to the final block in java, code under the final bloc