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Error Handling in Python

bookException Hierarchy

Let's return to the OOP topic. The Exception is a class that has different instances.


              
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print("=== FIRST CASE ===")
try:
    "string" + 5  # string + int
except TypeError as error:
    print("TypeError:", error)
    print("Is instance of TypeError:", isinstance(error, TypeError))

print("=== SECOND CASE ===")
try:
    "string" / 10  # string / int
except TypeError as error:
    print("TypeError:", error)
    print("Is instance of TypeError:", isinstance(error, TypeError))
copy

In the example above, the error is a variable that contains the TypeError instance.

First CaseSecond Case
ClassTypeErrorTypeError
Action for exceptionstr + intstr / int
Messagecan only concatenate str (not "int") to strunsupported operand type(s) for /: 'str' and 'int'

So, we have different instances of the TypeError class with different messages

Exception Hierarchy

The Exception classes have a class hierarchy:

Every Exception class is inherited from the BaseException class.

Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 2. Kapitel 2

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bookException Hierarchy

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Let's return to the OOP topic. The Exception is a class that has different instances.


              
12345678910111213

            
print("=== FIRST CASE ===")
try:
    "string" + 5  # string + int
except TypeError as error:
    print("TypeError:", error)
    print("Is instance of TypeError:", isinstance(error, TypeError))

print("=== SECOND CASE ===")
try:
    "string" / 10  # string / int
except TypeError as error:
    print("TypeError:", error)
    print("Is instance of TypeError:", isinstance(error, TypeError))
copy

In the example above, the error is a variable that contains the TypeError instance.

First CaseSecond Case
ClassTypeErrorTypeError
Action for exceptionstr + intstr / int
Messagecan only concatenate str (not "int") to strunsupported operand type(s) for /: 'str' and 'int'

So, we have different instances of the TypeError class with different messages

Exception Hierarchy

The Exception classes have a class hierarchy:

Every Exception class is inherited from the BaseException class.

Var allt tydligt?

Hur kan vi förbättra det?

Tack för dina kommentarer!

Avsnitt 2. Kapitel 2
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