The decorator pattern is a design pattern that allows you to wrap an object such that it will appear to execute a given behavior in many different ways at different points in program execution. This is especially useful when you want an object to have different behaviors at but are unable to mutate the object. The decorator pattern is a useful way to implement dynamic behavior without needing an extended inheritance-based class hierarchy. To use the decorator pattern you need four elements: a component interface; a concrete component; a decorator abstraction; and, a concrete decorator. The interface sets the contract for both component and decorator behavior, the decorator abstraction contains a pointer to some concrete component, and the concrete decorators wrap a concrete component and override behavior if desired.
Overall unfamiliarity with the concept. For people who have a passing acquaintance with algebra (or even basic arithmetic) or have used at least one other programming language, much of Python is intuitive. Very few people will have had any experience with the decorator concept before encountering it in Python. There's just no strong preexisting meme that captures the concept.
Just take a look at the code again. In the if/else clause we are returning greet and welcome, not greet() and welcome(). Why is that? It’s because when you put a pair of parentheses after it, the function gets executed; whereas if you don’t put parenthesis after it, then it can be passed around and can be assigned to other variables without executing it. Did you get it? Let me explain it in a little bit more detail. When we write a = hi(), hi() gets executed and because the name is yasoob by default, the function greet is returned. If we change the statement to a = hi(name = "ali") then the welcome function will be returned. We can also do print hi()() which outputs now you are in the greet() function.
This book - The Painter - is a mockery of honesty and reality. Instead, this novel is a male fantasy. An emotional man, a painter, a fisherman, a loner, full of anger and rage, who doesn't hesitate to act on his feelings, defend his family with violence and sleeps with women like he is drinking water - not to mention he gives one woman 4 orgasms in one night. (insert your funny joke about me, the reviewer here)
Guest Service Assistant – Holiday Inn London West. Holiday Inn London West Hotel is a 4* Hotel in Acton, West London that has 225 beautiful Executive and Deluxe Rooms, 7 large Meeting Rooms, a Gym, Restaurant and Bar which an exciting opportunity has arisen for an enthusiastic and passionate Guest Service Assistant to join our Front Office Department on Part Time Basis. Reporting to the Front Office Manager, the Guest Service Assistant is responsible for Checking in/out Guests on the Front Office Desk, Providing Excellent Guest Satisfaction, answering all Guest queries and ensuring an efficient and effective operation in the Front Office Department. Main Duties: To ensure that all services to the guests as requested are carried out efficiently and on time and are properly recorded and charged To fully ensure that any discrepancies are resolved or reported To ensure the security of the Hotel to the standard set by the Hotel Checks billing instructions and guest credit for compliance with hotel credit policy and minimise room rebates. To ensure all guest requests are met promptly and efficiently To action/deal with an

Guest Service Assistant – Holiday Inn London West. Holiday Inn London West Hotel is a 4* Hotel in Acton, West London that has 225 beautiful Executive and Deluxe Rooms, 7 large Meeting Rooms, a Gym, Restaurant and Bar which an exciting opportunity has arisen for an enthusiastic and passionate Guest Service Assistant to join our Front Office Department on Part Time Basis. Reporting to the Front Office Manager, the Guest Service Assistant is responsible for Checking in/out Guests on the Front Office Desk, Providing Excellent Guest Satisfaction, answering all Guest queries and ensuring an efficient and effective operation in the Front Office Department. Main Duties: To ensure that all services to the guests as requested are carried out efficiently and on time and are properly recorded and charged To fully ensure that any discrepancies are resolved or reported To ensure the security of the Hotel to the standard set by the Hotel Checks billing instructions and guest credit for compliance with hotel credit policy and minimise room rebates. To ensure all guest requests are met promptly and efficiently To action/deal with an
This difference becomes most important when there are several independent ways of extending functionality. In some object-oriented programming languages, classes cannot be created at runtime, and it is typically not possible to predict, at design time, what combinations of extensions will be needed. This would mean that a new class would have to be made for every possible combination. By contrast, decorators are objects, created at runtime, and can be combined on a per-use basis. The I/O Streams implementations of both Java and the .NET Framework incorporate the decorator pattern.

In England, little is known of the trade and its structures before the late 13th century, at which paint guilds began to form, amongst them the Painters Company and the Stainers Company. These two guilds eventually merged with the consent of the Lord Mayor of the City of London in 1502, forming the Worshipful Company of Painter-Stainers. The guild standardised the craft and acted as a protector of the trade secrets. In 1599, the guild asked Parliament for protection, which was eventually granted in a bill of 1606, which granted the trade protection from outside competition such as plasterers.[2]

The oldest known paintings are at the Grotte Chauvet in France, which some historians believe are about 32,000 years old. They are engraved and painted using red ochre and black pigment, and they show horses, rhinoceros, lions, buffalo, mammoth, abstract designs and what are possibly partial human figures. However, the earliest evidence of the act of painting has been discovered in two rock-shelters in Arnhem Land, in northern Australia. In the lowest layer of material at these sites, there are used pieces of ochre estimated to be 60,000 years old. Archaeologists have also found a fragment of rock painting preserved in a limestone rock-shelter in the Kimberley region of North-Western Australia, that is dated 40,000 years old.[7] There are examples of cave paintings all over the world—in Italy, France, Spain, Portugal, China, Australia, Mexico,[8] etc. In Western cultures, oil painting and watercolor painting have rich and complex traditions in style and subject matter. In the East, ink and color ink historically predominated the choice of media, with equally rich and complex traditions.
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