Python Interview Questions and Answers
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As we have already discussed, closure is a nested function that helps us access the outer function's variables even after the outer function is closed. For example,
def greet():
# variable defined outside the inner function
name = "John"
# return a nested anonymous function
return lambda: "Hi " + name
# call the outer function
message = greet()
# call the inner function
print(message())
Output:
Hi John
In the above example, we have created a function named greet() that returns a nested anonymous function.
Closures can be used to avoid global values and provide data hiding, and can be an elegant solution for simple cases with one or few methods.
However, for larger cases with multiple attributes and methods, a class implementation may be more appropriate.
Both append() and extend() methods are methods used to add elements at the end of a list.
Python has a multi-threading package ,but commonly not considered as good practice to use it as it will result in increased code execution time.
Functional programming is a coding style where the main source of logic in a program comes from functions.
Incorporating functional programming in our codes means writing pure functions.
Pure functions are functions that cause little or no changes outside the scope of the function. These changes are referred to as side effects. To reduce side effects, pure functions are used, which makes the code easy-to-follow, test, or debug.
Python does follow a functional programming style.
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