How Can I Replace Python 2's `execfile()` in Python 3?

Alternatives to execfile in Python 3

Python 3's removal of execfile() has left many wondering how to swiftly load scripts. While execfile() may be gone, alternative options exist.

Solution:

The documentation recommends using the exec() function with the contents of the file passed as an argument:

exec(open("filename").read())  # Replaces execfile("filename")

Explanation:

execfile() parsed and executed a file, while exec() executes a string. By reading the file contents into a string and passing them to exec(), we achieve the same effect as execfile().

Additional Considerations:

• This method maintains the local namespace during execution, unlike execfile(), which creates a new one.
• It's important to note that this technique can introduce security risks, so use it only when necessary and take appropriate precautions.

Further Reading:

• [What’s New In Python 3.0](https://docs.python.org/3/whatsnew/3.0.html)
• [execfile](https://docs.python.org/2/library/functions.html#execfile)
• [exec](https://docs.python.org/3/library/functions.html#exec)

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