What Does Exec Do Python

exec() in Python. exec() function is used for the dynamic execution of Python program which can either be a string or object code. If it is a string, the string is parsed as a suite of Python statements which is then executed unless a syntax error occurs and if it is an object code, it is simply executed.

Should we use exec in Python?

When you need exec and eval, yeah, you really do need them. But, the majority of the in-the-wild usage of these functions (and the similar constructs in other scripting languages) is totally inappropriate and could be replaced with other simpler constructs that are faster, more secure and have fewer bugs.

Why is exec bad Python?

As explained in other questions, eval / exec are considered bad practice because they’re generally abused to do a task where they aren’t needed, leading to potential security issues and generally bad programming.