🛑 Overriding this function is strongly discouraged. To change the semantics of the
import statement, use import hooks instead!
Still here? 😉 So, let’s get started learning the syntax of this function. You can also check out our in-depth article on the
__import__ statement here.
__import__(name, globals=None, locals=None, fromlist=(), level=0)
|Import the module with this |
|Set the global namespace in which to search the |
|Set the local namespace in which to search the |
|Import the names of objects to be imported using this list argument.|
|Use absolute (|
We call this a “Dunder Method” for “Double Underscore Method” (also called “magic method”). To get a list of all dunder methods with explanation, check out our dunder cheat sheet article on this blog.
Examples Overriding __import__
import my_module is semantically similar to the following:
my_module = __import__('my_module', globals(), locals(), , 0)
In case you need some background:
globals()returns a dictionary of
name --> objectmappings. The names are the ones defined globally, i.e., defined by Python or in the outside scope of your program. The objects are the values associated to these names.
locals()returns a dictionary of
name --> objectmappings. The names are the ones defined in the current local scope, i.e., defined within the current module, class, method, or function—whatever the most local scope is.
But what if you import an individual name (e.g.,
xyz) from the module
my_module? The call
import my_module.xyz gets translated to code similar to this one:
my_module = __import__('my_module.xyz', globals(), locals(), , 0)
💡 Note: The return value of the
__import__() dunder method is the top-level module, not the name xyz within it!
However, to import a module by name, the more Pythonic approach is
Where to Go From Here?
Enough theory. Let’s get some practice!
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