exceptions package

Module contents

Python’s standard exception class hierarchy.

Exceptions found here are defined both in the exceptions module and the built-in namespace. It is recommended that user-defined exceptions inherit from Exception. See the documentation for the exception inheritance hierarchy.

exception ArithmeticError

Bases: exceptions.StandardError

Base class for arithmetic errors.

exception AssertionError

Bases: exceptions.StandardError

Assertion failed.

exception AttributeError

Bases: exceptions.StandardError

Attribute not found.

exception BaseException

Bases: object

Common base class for all exceptions

args

message

exception BufferError

Bases: exceptions.StandardError

Buffer error.

exception BytesWarning

Bases: exceptions.Warning

Base class for warnings about bytes and buffer related problems, mostly related to conversion from str or comparing to str.

exception DeprecationWarning

Bases: exceptions.Warning

Base class for warnings about deprecated features.

exception EOFError

Bases: exceptions.StandardError

Read beyond end of file.

exception EnvironmentError

Bases: exceptions.StandardError

Base class for I/O related errors.

errno

exception errno

filename

exception filename

strerror

exception strerror

exception Exception

Bases: exceptions.BaseException

Common base class for all non-exit exceptions.

exception FloatingPointError

Bases: exceptions.ArithmeticError

Floating point operation failed.

exception FutureWarning

Bases: exceptions.Warning

Base class for warnings about constructs that will change semantically in the future.

exception GeneratorExit

Bases: exceptions.BaseException

Request that a generator exit.

exception IOError

Bases: exceptions.EnvironmentError

I/O operation failed.

exception ImportError

Bases: exceptions.StandardError

Import can’t find module, or can’t find name in module.

exception ImportWarning

Bases: exceptions.Warning

Base class for warnings about probable mistakes in module imports

exception IndentationError

Bases: exceptions.SyntaxError

Improper indentation.

exception IndexError

Bases: exceptions.LookupError

Sequence index out of range.

exception KeyError

Bases: exceptions.LookupError

Mapping key not found.

exception KeyboardInterrupt

Bases: exceptions.BaseException

Program interrupted by user.

exception LookupError

Bases: exceptions.StandardError

Base class for lookup errors.

exception MemoryError

Bases: exceptions.StandardError

Out of memory.

exception NameError

Bases: exceptions.StandardError

Name not found globally.

exception NotImplementedError

Bases: exceptions.RuntimeError

Method or function hasn’t been implemented yet.

exception OSError

Bases: exceptions.EnvironmentError

OS system call failed.

exception OverflowError

Bases: exceptions.ArithmeticError

Result too large to be represented.

exception PendingDeprecationWarning

Bases: exceptions.Warning

Base class for warnings about features which will be deprecated in the future.

exception ReferenceError

Bases: exceptions.StandardError

Weak ref proxy used after referent went away.

exception RuntimeError

Bases: exceptions.StandardError

Unspecified run-time error.

exception RuntimeWarning

Bases: exceptions.Warning

Base class for warnings about dubious runtime behavior.

exception StandardError

Bases: exceptions.Exception

Base class for all standard Python exceptions that do not represent interpreter exiting.

exception StopIteration

Bases: exceptions.Exception

Signal the end from iterator.next().

exception SyntaxError

Bases: exceptions.StandardError

Invalid syntax.

filename

exception filename

lineno

exception lineno

msg

exception msg

offset

exception offset

print_file_and_line

exception print_file_and_line

text

exception text

exception SyntaxWarning

Bases: exceptions.Warning

Base class for warnings about dubious syntax.

exception SystemError

Bases: exceptions.StandardError

Internal error in the Python interpreter.

Please report this to the Python maintainer, along with the traceback, the Python version, and the hardware/OS platform and version.

exception SystemExit

Bases: exceptions.BaseException

Request to exit from the interpreter.

code

exception code

exception TabError

Bases: exceptions.IndentationError

Improper mixture of spaces and tabs.

exception TypeError

Bases: exceptions.StandardError

Inappropriate argument type.

exception UnboundLocalError

Bases: exceptions.NameError

Local name referenced but not bound to a value.

exception UnicodeDecodeError

Bases: exceptions.UnicodeError

Unicode decoding error.

encoding

exception encoding

end

exception end

object

exception object

reason

exception reason

start

exception start

exception UnicodeEncodeError

Bases: exceptions.UnicodeError

Unicode encoding error.

encoding

exception encoding

end

exception end

object

exception object

reason

exception reason

start

exception start

exception UnicodeError

Bases: exceptions.ValueError

Unicode related error.

exception UnicodeTranslateError

Bases: exceptions.UnicodeError

Unicode translation error.

encoding

exception encoding

end

exception end

object

exception object

reason

exception reason

start

exception start

exception UnicodeWarning

Bases: exceptions.Warning

Base class for warnings about Unicode related problems, mostly related to conversion problems.

exception UserWarning

Bases: exceptions.Warning

Base class for warnings generated by user code.

exception ValueError

Bases: exceptions.StandardError

Inappropriate argument value (of correct type).

exception Warning

Bases: exceptions.Exception

Base class for warning categories.

exception ZeroDivisionError

Bases: exceptions.ArithmeticError

Second argument to a division or modulo operation was zero.