How to load a module from code in a string?

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Here is how to import a string as a module (Python 2.x): 

import sys,imp

my_code="a = 5"
mymodule = imp.new_module('mymodule')
exec my_code in mymodule.__dict__

In Python 3, exec is a function, so this should work: 

import sys,imp

my_code="a = 5"
mymodule = imp.new_module('mymodule')
exec(my_code, mymodule.__dict__)

Now access the module attributes (and functions, classes etc) as:

print(mymodule.a)
>>> 5

To ignore any next attempt to import, add the module to sys:

sys.modules['mymodule'] = mymodule

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