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      • What is __name__ in Python

      What is __name__ in Python

      • Posted by Python Point Team
      • Categories Python
      • Date December 6, 2020
      • Comments 0 comment
      what is __name__ in python

      The __name__ variable is a special Python variable. As you know there is no main() function in python. Indentation plays an important part in the execution of a python program. A python program can be executed on its on or it can be called as a module in other programs.

      If the source file is executed as the main program, the interpreter sets the __name__ variable to have a value “__main__”. If this file is being imported from another module, __name__ will be set to the module’s name.

      Let’s see how this exactly works with the help of example. Consider two files file1.py and file2.py

      print("File1 __name__ is %s" %__name__)
      
      if __name__ == "__main__":
      	print("File1 is being run directly")
      
      else:
      	print("File1 is being imported")
      import file1
      
      print("File2 __name__ is %s" %__name__)
      
      if __name__ == "__main__":
      	print("File2 is being run directly")
      
      else:
      	print("File2 is being imported")

      Output:

      As explained above, when file1.py is run directly, the interpreter sets the __name__ variable as __main__ and when it is run through file2.py by importing, the __name__ variable is set as the name of the python script, i.e. file1.

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