Python 질문있습니다.

The simplest explanation (imho) is the following:
 
Create the following files.
 
# a.py
import b
and
 
# b.py
print "Hello World from %s!" % __name__
 
if __name__ == '__main__':
    print "Hello World again from %s!" % __name__
Running them will get you this output:
 
$ python a.py
Hello World from b!
 
$ python b.py
Hello World from __main__!
Hello World again from __main__!

To define a source code encoding, a magic comment must
    be placed into the source files either as first or second
    line in the file, such as:
 
          # coding=<encoding name>
 
    or (using formats recognized by popular editors)
 
          #!/usr/bin/python
          # -*- coding: <encoding name> -*-
 
    or
 
          #!/usr/bin/python
          # vim: set fileencoding=<encoding name> :