6.3 Assignment statements

Assignment statements are used to (re)bind names to values and to modify attributes or items of mutable objects:

assignment_stmt: (target_list "=")+ expression_list
target_list: target ("," target)* [","]
target: identifier | "(" target_list ")" | "[" target_list "]" | attributeref | subscription | slicing

(See section 5.3 for the syntax definitions for the last three symbols.)

An assignment statement evaluates the expression list (remember that this can be a single expression or a comma-separated list, the latter yielding a tuple) and assigns the single resulting object to each of the target lists, from left to right.

Assignment is defined recursively depending on the form of the target (list). When a target is part of a mutable object (an attribute reference, subscription or slicing), the mutable object must ultimately perform the assignment and decide about its validity, and may raise an exception if the assignment is unacceptable. The rules observed by various types and the exceptions raised are given with the definition of the object types (see section 3.2).

Assignment of an object to a target list is recursively defined as follows.

If the target list is a single target: The object is assigned to that target.
If the target list is a comma-separated list of targets: The object must be a sequence with the same number of items as the there are targets in the target list, and the items are assigned, from left to right, to the corresponding targets. (This rule is relaxed as of Python 1.5; in earlier versions, the object had to be a tuple. Since strings are sequences, an assignment like "a, b = "xy"" is now legal as long as the string has the right length.)

Assignment of an object to a single target is recursively defined as follows.

If the target is an identifier (name):
- If the name does not occur in a global statement in the current code block: the name is bound to the object in the current local namespace.
- Otherwise: the name is bound to the object in the current global namespace.
The name is rebound if it was already bound. This may cause the reference count for the object previously bound to the name to reach zero, causing the object to be deallocated and its destructor (if it has one) to be called.
If the target is a target list enclosed in parentheses or in square brackets: The object must be a sequence with the same number of items as there are targets in the target list, and its items are assigned, from left to right, to the corresponding targets.
If the target is an attribute reference: The primary expression in the reference is evaluated. It should yield an object with assignable attributes; if this is not the case, TypeError is raised. That object is then asked to assign the assigned object to the given attribute; if it cannot perform the assignment, it raises an exception (usually but not necessarily AttributeError).
If the target is a subscription: The primary expression in the reference is evaluated. It should yield either a mutable sequence object (e.g., a list) or a mapping object (e.g., a dictionary). Next, the subscript expression is evaluated.
If the primary is a mutable sequence object (e.g., a list), the subscript must yield a plain integer. If it is negative, the sequence's length is added to it. The resulting value must be a nonnegative integer less than the sequence's length, and the sequence is asked to assign the assigned object to its item with that index. If the index is out of range, IndexError is raised (assignment to a subscripted sequence cannot add new items to a list).
If the primary is a mapping object (e.g., a dictionary), the subscript must have a type compatible with the mapping's key type, and the mapping is then asked to create a key/datum pair which maps the subscript to the assigned object. This can either replace an existing key/value pair with the same key value, or insert a new key/value pair (if no key with the same value existed).
If the target is a slicing: The primary expression in the clothing is evaluated. It should yield a mutable sequence object (e.g., a list). The assigned object should be a sequence object of the same type. Next, the lower and upper bound expressions are evaluated, insofar they are present; defaults are zero and the sequence's length. The bounds should evaluate to (small) integers. If either bound is negative, the sequence's length is added to it. The resulting bounds are clipped to lie between zero and the sequence's length, inclusive. Finally, the sequence object is asked to replace the slice with the items of the assigned sequence. The length of the slice may be different from the length of the assigned sequence, thus changing the length of the target sequence, if the object allows it.

(In the current implementation, the syntax for targets is taken to be the same as for expressions, and invalid syntax is rejected during the code generation phase, causing less detailed error messages.)

WARNING: Although the definition of assignment implies that overlaps between the left-hand side and the right-hand side are `safe' (e.g., "a, b = b, a" swaps two variables), overlaps within the collection of assigned-to variables are not safe! For instance, the following program prints "[0, 2]":

x = [0, 1]
i = 0
i, x[i] = 1, 2
print x

Subsections

6.3.1 Augmented Assignment statements

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

Kevin Carr in Stanton

Natural Skin Care and 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.

Termites eat wood, and can consequently cause great structural damage to your home if left unchecked. It is best to call for Termite Inspection service orange county. 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 for Termite Inspection orange countyCan help you understand the threat of termites, and take the necessary steps to protect your home.

JHT Pest Pros is at the forefront of our industry in using non-toxic, earth-friendly methods to eradicate pests. As heard on termites KFI am 640 JHT Pest Pros, some of these techniques are innovative and some have been around for a long time. JHT Pest Pros has what it takes to destroy termites in Orange, Los Angeles and.

|
Order iPhone 6 covers at ibattz.com. The battery life of the iPhone 6 promised to be a lot better, as it comes with a 25% longer lasting battery and, according to Apple's literature.

Mobile Home Pest Control

|
Order iPhone 6 covers at ibattz.com. The battery life of the iPhone 6 promised to be a lot better, as it comes with a 25% longer lasting battery and, according to Apple's literature.

Mobile Home Pest Control

|
Order iPhone 6 covers at ibattz.com. The battery life of the iPhone 6 promised to be a lot better, as it comes with a 25% longer lasting battery and, according to Apple's literature.

Mobile Home Pest Control

Kevin Carr in Stanton 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.

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.

Southern California Exterminators (the bug man) is at the forefront of our industry in using non-toxic, earth-friendly methods to eradicate pests. Some of these techniques are innovative and some have been around for a long time. Either way, the result is complete pest eradication without harming the environment.

Click this link and give them a call now: skate decks

Roxy Clothing provides the best product and service in the mail order business. So when you are in Southern California check out one of their ride shop retail locations.

Pest Inspectionspest control services southern california under buildings. Termites residential Termite Inspection southern california under homes. These are the area specialists.

|
Order iPhone 6 covers at ibattz.com. The battery life of the iPhone 6 promised to be a lot better, as it comes with a 25% longer lasting battery and, according to Apple's literature.

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.

The smartwatch for girls is the perfect blend of style and functionality! This exquisite timepiece is designed to empower young girls, keeping them connected, active, and stylish throughout their day. The incredible benefits this smartwatch brings to your little one's life.

I bought one of these for my girl. She said, "wow, sweet!"

Now she can stay connected like never before with our smartwatch's seamless connectivity features. With just a tap, my girl can effortlessly make and receive calls, send text messages, and stay in touch with friends and family. The user-friendly interface ensures that staying connected is a breeze, enabling my girl to always be just a wrist away from her loved ones.

And I got a smartwatch for my boy too!

Encourage a healthy and active lifestyle with the built-in fitness features of a childrens i watch. Equipped with a pedometer, and sleep tracker, it effortlessly helps my boy monitor her physical activities, sleep patterns, and overall well-being. The smartwatch acts as a personal fitness companion, motivating to achieve health goals and make positive lifestyle choices.

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 Mayor Dave Shawver 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 andSnap Media Appto install with edelbrock rpm air gap then my car will run better. We purchased edelbrock rpm heads sbc with the beaches closed free stock video 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