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Python except Keyword

The Python except keyword is used in exception handling. If there is an error in the program the remaining part of code does not execute. To handle the errors and know the type of error we use except block. This block is executed only when an error raised in the try block.

If the except block used without try block in the code it will raise an SyntaxError. In a program to know type of error occurred we use exception in the except block. It is a case-sensitive keyword which creates except block.

Following is a syntax of the Python except keyword −

try:
    statement1
except:
    statement2

Following is an basic example of the Python except keyword −

try :
    print("Welcome to the Tutorialspoint")
except:
    print("Error")

Following is the output of the above code −

Welcome to the Tutorialspoint

When we use Exception in the except block we can know the type of error raised in the try block.

Here, we have given a critical statement in the try block, which raise an error. We found the type of error in the except block −

var1 = 1
var2 = 0
try :
    print(var1//var2)
except Exception as e:
    print("Type of Error :",e)

Output

Following is the output of the above code −

Type of Error : integer division or modulo by zero

The finally block is executed regardless if the try block raises error or not.

Following is an example of except block with finally −

var1 = 9
var2 = 'zero'
try :
    print(var1//var2)
except Exception as e:
    print("Error :",e)
finally:
    print("This block is executed irrespective to the error") 

Output

Following is the output of the above code −

Error : unsupported operand type(s) for //: 'int' and 'str'
This block is executed irrespective to the error

python_keywords.htm

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