Performance between “from package import” and “package import”

Question

Is there a performance difference between “from import package” and “import package”?

Answer 1

No, the difference is not in performance. In both cases, the entire module must be analyzed, and any module level code will be executed. The only difference is the namespace: firstly, all the names of the imported module will become the names in the current module; in the second, only the package name is determined in the current module.

However, there is very rarely a good reason to use from foo import * . Either import the module or import specific names from it.