Python Exception Handling with Try, Except, Else, and Finally, Cheat Sheet of Mathematics

PythonTry Except

Thetryblock lets you test a block of code for errors.

Theexceptblock lets you handle the error.

Theelseblock lets you execute code when there is no error.

Thefinallyblock lets you execute code, regardless of the result of the try- and except blocks.

Exception Handling: When an error occurs, or exception as we call it, Python will normally stop

and generate an error message.These exceptions can be handled using thetrystatement:

Example

Without the try block, the program will crash and raise an error:

Example

This statement will raise an error, becausexis not defined:

print(x)

Many Exceptions

You can define as many exception blocks as you want, e.g. if you want to execute a special block of code for a special kind of

error:

Example

Print one message if the try block raises aNameErrorand another for other errors:

try:

try:

print(x)

exceptNameError:

print("Variable x is not defined")

except:

print("Something else went wrong")

finally: