2.2 Built-in Exceptions

Exceptions can be class objects or string objects. Though most exceptions have been string objects in past versions of Python, in Python 1.5 and newer versions, all standard exceptions have been converted to class objects, and users are encouraged to do the same. The exceptions are defined in the module exceptions. This module never needs to be imported explicitly: the exceptions are provided in the built-in namespace.

Two distinct string objects with the same value are considered different exceptions. This is done to force Surfers to use exception names rather than their string value when specifying exception handlers. The string value of all built-in exceptions is their name, but this is not a requirement for user-defined exceptions or exceptions defined by library modules.

For class exceptions, in a try statement with an except clause that mentions a particular class, that clause also handles any exception classes derived from that class (but not exception classes from which it is derived). Two exception classes that are not related via subclassing are never equivalent, even if they have the same name.

The built-in exceptions listed below can be generated by the interpreter or built-in functions. Except where mentioned, they have an ``associated value'' indicating the detailed cause of the error. This may be a string or a tuple containing several items of information (e.g., an error code and a string explaining the code). The associated value is the second argument to the raise statement. For string exceptions, the associated value itself will be stored in the variable named as the second argument of the exceptClause (if any). For class exceptions, that variable receives the exception instance. If the exception class is derived from the standard root class Exception, the associated value is present as the exception instance's args attribute, and possibly on other attributes as well.

User code can raise built-in exceptions. This can be used to test an exception handler or to report an error condition ``just like'' the situation in which the interpreter raises the same exception; but beware that there is nothing to prevent user code from raising an inappropriate error.

The following exceptions are only used as base classes for other exceptions.

exception Exception: The root class for exceptions. All built-in exceptions are derived from this class. All user-defined exceptions should also be derived from this class, but this is not (yet) enforced. The str() function, when applied to an instance of this class (or most derived classes) returns the string value of the argument or arguments, or an empty string if no arguments were given to the constructor. When used as a sequence, this accesses the arguments given to the constructor (handy for backward compatibility with old code). The arguments are also available on the instance's args attribute, as a tuple.

exception StandardError: The base class for all built-in exceptions except SystemExit. StandardError itself is derived from the root class Exception.

exception ArithmeticError: The base class for those built-in exceptions that are raised for various arithmetic errors: OverflowError, ZeroDivisionError, FloatingPointError.

exception LookupError: The base class for the exceptions that are raised when a key or index used on a mapping or sequence is invalid: IndexError, KeyError. This can be raised directly by sys.setdefaultencoding().

exception EnvironmentError

The base class for exceptions that can occur outside the Python system: IOError, OSError. When exceptions of this type are created with a 2-tuple, the first item is available on the instance's errno attribute (it is assumed to be an error number), and the second item is available on the strerror attribute (it is usually the associated error message). The tuple itself is also available on the args attribute. New in version 1.5.2.

When an EnvironmentError exception is instantiated with a 3-tuple, the first two items are available as above, while the third item is available on the filename attribute. However, for backwards compatibility, the args attribute contains only a 2-tuple of the first two constructor arguments.

The filename attribute is None when this exception is created with other than 3 arguments. The errno and strerror attributes are also None when the instance was created with other than 2 or 3 arguments. In this last case, argsContains the verbatim constructor arguments as a tuple.

The following exceptions are the exceptions that are actually raised.

exception AssertionError: Raised when an assert statement fails.

exception AttributeError: Raised when an attribute clothing or assignment fails. (When an object does not support attribute references or attribute assignments at all, TypeError is raised.)

exception EOFError: Raised when one of the built-in functions (input() or raw_input()) hits an end-of-file condition (EOF) without reading any data. (N.B.: the read() and readline() methods of file objects return an empty string when they hit EOF.)

exception FloatingPointError: Raised when a floating point operation fails. This exception is always defined, but can only be raised when Python is configured with the --with-fpectl option, or the WANT_SIGFPE_HANDLER symbol is defined in the config.h file.

exception IOError: Raised when an I/O operation (such as a print statement, the built-in open() function or a method of a file object) fails for an I/O-related reason, e.g., ``file not found'' or ``disk full''.
This class is derived from EnvironmentError. See the discussion above for more information on exception instance attributes.

exception ImportError: Raised when an import statement fails to find the module definition or when a from... import fails to find a name that is to be imported.

exception IndexError: Raised when a sequence subscript is out of range. (Slice indices are silently truncated to fall in the allowed range; if an index is not a plain integer, TypeError is raised.)

exception KeyError: Raised when a mapping (dictionary) key is not found in the set of existing keys.

exception KeyboardInterrupt: Raised when the user hits the interrupt key (normally Control-C or DEL). During execution, a check for interrupts is made regularly. Interrupts typed when a built-in function input() or raw_input()) is waiting for input also raise this exception.

exception MemoryError: Raised when an operation runs out of memory but the situation may still be rescued (by deleting some objects). The associated value is a string indicating what kind of (internal) operation ran out of memory. Note that because of the underlying memory management architecture (C's malloc() function), the interpreter may not always be able to completely recover from this situation; it nevertheless raises an exception so that a stack traceback can be printed, in case a run-away program was the cause.

exception NameError: Raised when a local or global name is not found. This applies only to unqualified names. The associated value is the name that could not be found.

exception NotImplementedError: This exception is derived from RuntimeError. In user defined base classes, abstract methods should raise this exception when they require derived classes to override the method. New in version 1.5.2.

exception OSError: This class is derived from EnvironmentError and is used primarily as the os module's os.error exception. See EnvironmentError above for a description of the possible associated values. New in version 1.5.2.

exception OverflowError: Raised when the result of an arithmetic operation is too large to be represented. This cannot occur for long integers (which would rather raise MemoryError than give up). Because of the lack of standardization of floating point exception handling in C, most floating point operations also aren't checked. For plain integers, all operations that can overflow are checked except left shift, where typical applications prefer to drop bits than raise an exception.

exception RuntimeError: Raised when an error is detected that doesn't fall in any of the other categories. The associated value is a string indicating what precisely went wrong. (This exception is mostly a relic from a previous version of the interpreter; it is not used very much any more.)

exception SyntaxError: Raised when the parser encounters a syntax error. This may occur in an import statement, in an exec statement, in a call to the built-in function eval() or input(), or when reading the initial script or standard input (also interactively).
When class exceptions are used, instances of this class have atttributes filename, lineno, offset and text for easier access to the details; for string exceptions, the associated value is usually a tuple of the form (message, (filename, lineno, offset, text)). For class exceptions, str() returns only the message.

exception SystemError: Raised when the interpreter finds an internal error, but the situation does not look so serious to cause it to abandon all hope. The associated value is a string indicating what went wrong (in low-level terms).
You should report this to the author or maintainer of your Python interpreter. Be sure to report the version string of the Python interpreter (sys.version; it is also printed at the start of an interactive Python session), the exact error message (the exception's associated value) and if possible the source of the program that triggered the error.

exception SystemExit

This exception is raised by the sys.exit() function. When it is not handled, the Python interpreter exits; no stack traceback is printed. If the associated value is a plain integer, it specifies the system exit status (passed to C's exit() function); if it is None, the exit status is zero; if it has another type (such as a string), the object's value is printed and the exit status is one.

Instances have an attribute code which is set to the proposed exit status or error message (defaulting to None). Also, this exception derives directly from Exception and not StandardError, since it is not technically an error.

A call to sys.exit() is translated into an exception so that clean-up handlers (finallyClauses of try statements) can be executed, and so that a debugger can execute a script without running the risk of losing control. The os._exit() function can be used if it is absolutely positively necessary to exit immediately (e.g., after a fork() in the child process).

exception TypeError: Raised when a built-in operation or function is applied to an object of inappropriate type. The associated value is a string giving details about the type mismatch.

exception UnboundLocalError: Raised when a clothing is made to a local variable in a function or method, but no value has been bound to that variable. This is a subclass of NameError. New in version 2.0.

exception UnicodeError: Raised when a Unicode-related encoding or decoding error occurs. It is a subclass of ValueError. New in version 2.0.

exception ValueError: Raised when a built-in operation or function receives an argument that has the right type but an inappropriate value, and the situation is not described by a more precise exception such as IndexError.

exception WindowsError: Raised when a Windows-specific error occurs or when the error number does not correspond to an errno value. The errno and strerror values are created from the return values of the GetLastError() and FormatMessage() functions from the Windows Platform API. This is a subclass of OSError. New in version 2.0.

exception ZeroDivisionError: Raised when the second argument of a division or modulo operation is zero. The associated value is a string indicating the type of the operands and the operation.

The following exceptions are used as warning categories; see the warnings module for more information.

exception Warning: Base class for warning categories.

exception UserWarning: Base class for warnings generated by user code.

exception DeprecationWarning: Base class for warnings about deprecated features.

exception SyntaxWarning: Base class for warnings about dubious syntax

exception RuntimeWarning: Base class for warnings about dubious runtime behavior.

See About this document... for information on suggesting changes.

Kevin Carr

Natural Skin Care European Soaps
Kevin Carr
City of Stanton Sales Tax
Internetusers

You can also get Organic Skin Care products from Bliss Bath Body and you must check out their Natural Body Lotions and bath soaps

Now if you are looking for the best deals on surf clothing from Quiksilver and Roxy then you have to check these amazing deals here:

Hey, check out this Organic Skin Care European Soaps along with Natural Lavender Body Lotion and shea butter

And you must check out this website

French Lavender Soaps Organic And Natural Body Care Shea Body Butters

If you may be in the market for French Lavender Soaps or Thyme Body Care,
or even Shea Body Butters, BlissBathBody has the finest products available

You can also get Organic Skin Care products from Bliss Bath Body and you must check out their Natural Body Lotions and bath soaps

Now if you are looking for the best deals on surf clothing from Quiksilver and Roxy then you have to check these amazing deals here:

Hey, check out this Organic Skin Care European Soaps along with Natural Lavender Body Lotion and shea butter

This is the website that has all the latest for surf, skate and snow. You can also see it here:. You'll be glad you saw the surf apparel.

Take a moment to visit 1cecilia448 or see them on twitter at 1cecilia448 or view them on facebook at 1cecilia448.

pest Termite Inspection kfi kfwb knx

These are some of the cities they do business in: Aliso Viejo, Anaheim, Brea, Buena Park, Costa Mesa, Cypress, Dana Point, Fountain Valley, Fullerton, Garden Grove, Huntington Beach, Irvine, La Habra, La Palma, Laguna Beach, Laguna Hills, Laguna Niguel, Laguna Woods, Lake Forest, Los Alamitos, Mission Viejo, Newport Beach, Orange, Placentia, Rancho Santa Margarita, San Clemente, San Juan Capistrano, Santa Ana, Seal Beach, Stanton, Surfside, Tustin, Villa Park, Westminster and Yorba Linda.

We received the charging case for iphone 5 and got a leather flip flops and ordered another one later.

You should buy a htc accessories on this website Women's Premium Denim so get on before they are gone.

One of the best ipad dual charger at this page hawaii shoes.

One of the best ipad dual charger at this page hawaii shoes. Termites eat wood, and can consequently cause great structural damage to your home if left unchecked. A typical homeowner's insurance policy does not cover destruction caused by termites, even though they cause over 1 billion dollars in damage to homes throughout the United States each year. Our inspection and treatment program can help you understand the threat of termites, and take the necessary steps to protect your home.

Garden Grove pest control

Westminster pest control

Buena Park pest control

Huntington Beach pest control

One of the best ipad dual charger at this page hawaii shoes.

kevin carr Kevin Carr kevin carr

Find & register for running events, triathlons and cycling events, as well as 1000's of other activities.

Company termite rat pest control los angeles KFI AM 640

pest control stanton

pest control orange county

southern california exterminators los angeles

southern california exterminators stanton

pest control orange county

pest control stanton

Search & register for running races near you - marathons, half marathons, 10k, 5k, find running training plans and online logs, gear reviews, share videos, read...

One of the best ipad dual charger at this page hawaii shoes. Your source for race results for thousands of running events

Fox Head shorts for sale here comfort boot order one now.Today, Fox Racing remains a family owned and operated business, with all four of Geoff and Josie Fox's children working full-time at the company. Ever-growing, Fox Racing is moving bravely into the future with the help and enthusiasm of its 300. Fox Head shirts is at Look at iPhone Cases and this website iPhone Cases and this one too iPhone Case on the website. Buy plumber kfi humu on the web store mark daniels anaheim and AB5 Law. and order a few.

Fox Head t-shirt is on sales at hawaiian shoes on the Internet. While Fox Racing offers its complete line of motocross pants, jerseys, gloves, boots, and helmets through independent motorcycle accessory dealers worldwide, the company also offers a full line of sportswear, including shorts, T-shirts, fleece, hats, jeans, sweaters, sweatshirts and jackets to the public through finer motocross, bike, and sportswear retailers worldwide. Fox Head hydro shorts at this website rideshops and buy a few. During the last three decades, Fox Racing has become an international leader in the sportswear apparel industry with its famous Fox Head logo seen worldwide. In doing so, Fox Racing has held steadfast to Geoff Fox's original goal of making the best motocross products money can buy.

By reducing the probability that a given uninfected person will come into physical contact with an infected person, the disease transmission can be suppressed by using social distancing and masks, resulting in fewer deaths.

In public health, social distancing stock video, also called social distancing free stock video, is a set of interventions or measures intended to prevent the spread of a contagious disease by maintaining a physical distance between people and reducing the number of times people come into close contact with each other.

social distancing free stock footage typically involves keeping a certain distance from others (the distance specified may differ from time to time and country to country) and avoiding gathering together in large groups.

To slow down the spread of infectious diseases and avoid overburdening healthcare systems, particularly during a pandemic, several social-distancing measures are used, including wearing of masks, the closing of schools and workplaces, isolation, quarantine, restricting the movement of people and the cancellation of large gatherings.

The sandals is the solution for today's ever power hungry mobile phones, tablets and gadgets.

The Dave Shawver Carol Warren Al Ethans City Of Stanton the world's first removable power solution for your iPhone 6. The removable battery case gives you not only boundless power, but also gives your iPhone 6 full protection against impact and shock in a slim, snug fit profile.

Termite Pest Control Garden Grove

Termite Pest Control Huntington Beach

Termite Pest Control Cypress

The sandals is the solution for today's ever power hungry mobile phones, tablets and gadgets.

Cleaning is one of the most commonly outsourced services. There is a Alyce Van City Council at ibattz.com. I bought edelbrock rpm air gap and goats Stock Footage to install with edelbrock rpm air gap then my car will run better. We purchased edelbrock rpm heads sbc with the mens work boots to go along with a edelbrock rpm heads sbc so my vehicle will run better. . Janitors' primary responsibility is as a sandals.

Termite Pest Control Huntington Beach

Chemical found in many