Agfdhyk

I'd like to use self (for global variables) and the parameters from the command-line in my Python Script but can't really get them to work.

def otherFunction(self)

    print self.tecE



def main(argv,self):

    self.tecE = 'test'

    otherFunction()



if __name__ == "__main__":

   main(sys.argv[1:],self)

This gives me an error:

    main(sys.argv[1:],self)

NameError: name 'self' is not defined

So how and where to define self?

Usually the python convention of self is to be used in python classes, you did a bit of a mess.

So either you are not using classes and treating self just as a global dict, like this:

import sys

myglobal = {} # Didn't want to name it self, for avoiding confusing you :)



def otherFunction():

    print myglobal["tecE"]



def main(argv):

    myglobal["tecE"] = 'test'

    otherFunction()



if __name__ == "__main__":

   main(sys.argv[1:])

Or writing a class, like this:

import sys



class MyClass():



    def otherFunction(self):

        print self.tecE



    def main(self, argv):

        self.tecE = 'test'

        self.otherFunction() # Calling other class members (using the self object which actually acting like the "this" keyword in other languages like in Java and similars)



if __name__ == "__main__":

   myObj = MyClass()  # Instantiating an object out of your class

   myObj.main(sys.argv[1:])

So how and where to define self?

You will use self:

1. As the first argument of your class methods def my_method(self, arg1, arg2):
   


2. Within the class to refer to any other class members (just as demonstrated above) self.do_job("something", 123)
   


3. For creating class members: self.new_field = 56 Usually in __init__() constructor method

Note: decalring a class variable without the self.new_var, will create a static class variable.