How can I add attributes to a module at run time?

Question

I have a need to add module attributes at run time. For example, when a module is loaded, it reads the file where the data is contained. I would like that data to be avail

Answer 1

Add it as a key to the object's internal dictionary __dict__

my_object.__dict__['newattribute'] = 'attributevalue'

Answer 2

Just set it.

my_object = MyObject()
my_object.my_custom_attribute = 'my_value'

Answer 3

Thanks @Dharmesh. That was what I needed. There is only one change that needs to be made. The module won't be importing itself so to get the module object I can do:

setattr(sys.modules[__name__], 'attr1', 'attr1')

Answer 4

If you don't know the attribute name until runtime, use setattr:

>>> import mymodule
>>> setattr(mymodule, 'point', (1.0, 4.0))
>>> mymodule.point
(1.0, 4.0)

Answer 5

The global scope of a module is the module itself, so just set a global.

# module.py
a = 1

# script.py
import module
print module.a
# 1

Answer 6

Create dynamic class 'Module' and add attributes dynamically using dictionary like :

attributes = {'attr1': 'attr1', 'attr2': 'attr2'}
module = type('Module', (), attributes)

OR Create only dynamic class 'Module'

module = type('Module', (), {})

and add attribute with setattr method like this:

setattr(module, 'attr3', 'attr3')

OR

import module
setattr(module, 'attr1', 'attr1')