Скачать или смотреть #46 Python Tutorial for Beginners | Special Variable __name__

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In this lecture we will learn:
What is the starting point of execution of code?
What is a special variable in Python?
_name_ variable in python
How the name variable works in Python?


#1
_main_ is the starting point of the python.
The first module name is always main and the code starts from main.
_name_ is a variable name that return the __main__.
name_ is a built-in variable that evaluates the name of the current module.
The value of the name changes as per the place where it is used, so that's why it is known as a variable.
If you are an individual file or module, then the name will return main.
If you are importing another module containing the name variable in any file, then the name variable will return the name of that module.
OR,
If you are running a file as a main and using a named variable in it, then it will print the main.
But if you are printing a name that is imported as a module in another file, then it will print the module name.

#2
The use of a function with the name variable helps the interpreter in checking if it's parsing the currently executed script, or if it's temporarily parsing another external script.
if _name_ == "__main__":
This statement helps us to control the behaviour of different parts of the program.
It chooses the number of lines of codes that can be executed from the external script as well as the currently executed script depending on the scenarios.

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