[python] __name__

1. __name__

• __name__ is a built in variable in every python module.
• Its value is set automatically. 
• __name__ is set to the name of the current module. 

ex)

s

• But as soon as code begins running form a file, the __name_ of the file evaluates to '__main__' 
• That file's name remains '__main__' for the duration of the program.