How to create a module object by content in Python [duplicate]

Question

I have a string which contains a python code. Is there a way to create a python module object using the string without an additional file?

content = "import math\n\ndef f(x):\n    return math.log(x)"

my_module = needed_function(content) # <- ???

print my_module.f(2) # prints 0.6931471805599453

Please, don't suggest using eval or exec. I need a python module object exactly. Thanks!

I just wonder why you'd need a real separate module for that. — WorldSEnder
– WorldSEnder, Commented Sep 11, 2015 at 14:06

wap26 · Accepted Answer · 2015-09-11 14:09:47Z

9

You can create an empty modules with imp module then load your code in the module with exec.

content = "import math\n\ndef f(x):\n    return math.log(x)"

import imp
my_module = imp.new_module('my_module')
exec content in my_module.__dict__ # in python 3, use exec() function

print my_module.f(2)

This is my answer, but I do not recommend using this in an actual application.

edited Sep 11, 2015 at 14:09

answered Sep 11, 2015 at 14:02

wap26

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3 Comments

Jordan Dimov Over a year ago

This is the correct answer. Of course, you should never ever do this.

WorldSEnder Over a year ago

just learned about exec .. in .., "nice"

winwin Over a year ago

how would you do it now, once imp module is deprecated and up for removal in 3.12?

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