CODEWITHSUNDEEP
pythonvariablesimport
mrdigital
mrdigital

Reputation: 79

python import variables

Got 2 files:

First is called: main.py

import side

var = 1

side.todo()

Second is called: side.py

import main


def todo():
    print "printing variable from MAIN: %s" %(main.var)

I get an error, when i run main.py:

AttributeError: 'module' object has no attribute 'todo'

In python are you not allowed to borrow and use variables, in such manner?

I have tried to search for documentation related to this, but could not find anything related to this problem.

Surely, there is an alternate way of doing this?

Upvotes: 1

Views: 2151

Answers (2)

Johanna Larsson
Johanna Larsson

Reputation: 10761

A fast and ugly solution is to move the import statement to where it will not be executed until it is needed in side.py

def todo():
    import main
    print "printing variable from MAIN: %s" %(main.var)

I would advice against it though. The example is contrived, but I'm sure you can find a nicer solution to your specific case.

Upvotes: 0

Ignacio Vazquez-Abrams
Ignacio Vazquez-Abrams

Reputation: 798576

The problem is not "you can't have cyclic imports", it's that you can't use a name before it's defined. Move the call to side.todo() somewhere it won't happen as soon as the script is run, or move main.var into a third module.

Upvotes: 2

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