exception UnboundLocalError Raised when a reference is made to a local variable in a function or method, but no value has been

exception FileNotFoundError Raised when a file or directory is requested but doesn’t exist. Corresponds to errno

args The tuple of arguments given to the exception constructor. Some built-in exceptions (like OSError) expect

filename filename2 For exceptions that involve a file system path (such as

object The object the codec was attempting to encode or decode.

exception BaseException The base class for all built-in exceptions. It is not meant to be directly inherited by user-defined

start The first index of invalid data in

exception StopIteration Raised by built-in function

exception UnicodeEncodeError Raised when a Unicode-related error occurs during encoding. It is a subclass of UnicodeError

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