Python Built-in Exceptions[ 2024 ]

Python Built-in Exceptions

In this tutorial, we will look at some Python built-in exceptions. Python has plenty of built-in exceptions that are raised when corresponding errors occur. We can view all the built-in exceptions using the built-in local() function as follows:

Some of the common built-in exceptions in Python are as follows. These are also called Python standard exceptions.

Exception	Description
AssertionError	This exception is raised when an assert statement fails in the test.
AttributeError	This exception is raised when attribute assignment or reference fails
EOFError	This exception is raised when the input() function reaches the end-of-file.
FloatingPointError	The FloatingPointError exception is raised when a floating point operation fails.
FileNotFoundError	The FileNotFoundError exception is raised when the program tries to open a file that does not exist on the file system.
GeneratorExit	This exception is raised when a generator’s close() method is invoked.
ImportError	This exception is raised when the imported module is not found. We get this error when we try to import a module that does not exist.
IndexError	This is raised when the index of a sequence is out of range.
IndentationError	This IndentationError exception is raised when there is an incorrect indentation in the code, usually when mixing tabs and spaces or inconsistent indentation.
KeyError	KeyError exception is raised when a key is not found in a dictionary.
KeyboardInterrupt	This exception is raised when the user hits the interrupt key on the keyboard. (Ctrl+C or Delete)
MemoryError	MemoryError is raised when an operation runs out of memory.
NameError	The NameError exception is raised when a variable is not found in the program’s local or global scope.

Many others include OSError, OverflowError, RuntimeError, SyntaxError, SystemError, ZeroDivisionError, etc.

 

OSError	OSError is raised when system operation causes system-related error.
OverflowError	OverflowError is raised when the result of an arithmetic operation is too large to be represented.
ReferenceError	ReferenceError is raised when a weak reference proxy is used to access a garbage-collected referent.
RuntimeError	RuntimeError is raised when an error does not fall under any other category.
StopIteration	The next() function raises StopIteration to indicate that the iterator will no longer return any items.
SyntaxError	SyntaxError is raised by the parser when a syntax error is encountered.
SystemError	SystemError is raised when the interpreter detects an internal error.
SystemExit	SystemExit is raised by the sys.exit() function.
TypeError	TypeError is raised when a function or operation is applied to an object of incorrect type.
UnicodeError	UnicodeError is raised when a Unicode-related encoding or decoding error occurs.
ValueError	ValueError is raised when a function gets an argument of correct type but improper value.
ZeroDivision Error	ZeroDivisionError is raised when the second operand of division or modulo operation is zero.

 

Example

Example of Python Built-in exceptions:

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