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What are the source code for built-in python function like code behind sorted or enumerate etc...?
Since Python is open source you can read the source code.
To find out what file a particular module or function is implemented in you can usually print the
__file__attribute. Alternatively, you may use theinspectmodule, see the section Retrieving Source Code in the documentation ofinspect.For built-in classes and methods this is not so straightforward since
inspect.getfileandinspect.getsourcewill return a type error stating that the object is built-in. However, many of the built-in types can be found in theObjectssub-directory of the Python source trunk. For example, see here for the implementation of the enumerate class or here for the implementation of thelisttype.