CODEWITHSUNDEEP
pythonclassglobal-variables
diegoaguilar
diegoaguilar

Reputation: 8376

Acessing to global variable from class function in Python

I want to get a variable which can be used at any method from any class.

I started like this:

class clasificadorDeTweet:

    """Funciones para clasificar tweets"""
    def fx():
        print trendingTopics

def iniciarConjuntoTrendingTopics():

    trendingTopics = ['EPN', 'PRI', 'Peña Nieto', 'México', 'PresidenciaMX', 'Osorio Chong', 'SEDENA', 'PEMEX', 'Reforma Energética', 'Guerra contra el narco', 'Reforma Fiscal', 'Los Pinos'];
    return set(trendingTopics)

global trendingTopics 
trendingTopics = iniciarConjuntoTrendingTopics()

x=clasificadorDeTweet()
x.fx

But I'm not getting anything printed. What have I got wrong?

Upvotes: 0

Views: 56

Answers (2)

dennitorf
dennitorf

Reputation: 319

If you want acces to trendingTopics, you have to declare trendingTopics as global on the method scope

def fx(): global tredingTopics print tredingTopics

Upvotes: 0

Wooble
Wooble

Reputation: 89847

You need to call the method x.fx by adding () after it:

x.fx()

However, this isn't your only problem; fx is an instance method, so it needs to take self (by convention; you can call it anything you want, but you need to have some parameter) as the first parameter.

You probably also want to use unicode strings in trendingTopics and declare a source encoding at the start of your file; embedding non-ASCII strs in your code may coincidentally work perfectly fine, then break horribly when moved to another system.

Your global statement at the module level also does literally nothing at all. Variables assigned at the module scope are already globals.

Upvotes: 1

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