Answer : The inner query is executed only once…
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Answer : The union operator combines the results of two or more queries into a single result set…
Answer : Index is a database object which improves the efficiency of the query…
Answer : Duck typing is the “type” of the object is a matter of concern only……
Answer : The symbol >>> is used to point out that what’s coming after is Python Code…..
Answer : A decorator in Python is a function that takes another function as an argument…
Answer : A wrapper is a python module that interface between python and another software library function which is a non python interface.
Answer : Python’s pickle module is a serialization (converting the object into streams of bytes) library which is used to serialize the python objects.
Answer : The flask is a web-development framework and it is one of the most-popular modules of python for web developers.
Answer : It is a light-weight process and they don’t require more memory overhead they are less expensive than processes.
Answer : The union() method returns a new set with distinct elements from each and every one of the sets.
Answer : A super() indicates the immediate parent of actual class. Just like `self` which is not a keyword, but to access parent.