How to import a python module inside lambda?

user_12269854 0
Viewed 2066

For suppose depending upon the variable I want to import some classes, create its object and return it. for example :

if x=='SomeThing':
  import something
  object = something's object
else:
  import nothing
  object = nothing's object
object.function()

I want to do the above using the lambda how can I do this?

python-3.x python-import function lambda python
2 Answers

You can use magic __import__:

importer = lambda x: (__import__("pandas").DataFrame if x == 0 
                      else __import__('numpy').arange)

NOTE: This is extremely ugly, and not at all recommended, unless you absolutely need to do it.

user_54317910

It is rarely an issue to simply import both modules unconditionally, and select which module to actually use later.

import something
import nothing

(something if x == 'SomeThing' else nothing).object.function()

If you do need to perform conditional imports, import one or the other, but using the same name.

if x == 'SomeThing':
    import something as thingmodule
else:
    import nothing as thingmodule

thingmodule.object.function()
user_11268410
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