Python 文件导入使用字符串

Question

I am trying to import a function from another python file in a different directory but only have the function name in string form. I have tried using import lib as follows:

sys.path.insert(1, file_path) # Works fine
import file # Works fine
run_function = importlib.import_module("file.function"+str(loop)) # Error occurs here

But when I try this I get the error message: ModuleNotFoundError: No module named 'file.function1'; 'file' is not a package ModuleNotFoundError: No module named 'file.function1'; 'file' is not a package

I have also tried doing:

from file import *
eval("function{loop}()")

But with this method I recieve the error message: SyntaxError: import * only allowed at module level

I am not sure exactly how to fix the issue or whether there would be a better way of doing this. I am open to suggestions. Thanks!

Answer 1

You don't import functions. You have successfully imported the module, which includes the function, so all you have to do is get it

sys.path.insert(1, file_path) # Works fine
import file # Works fine
result = getattr(file, "function1")(loop)

Answer 2

You can import anywhere in the file (obviously importing within a function would limit the module scope to the function itself).

def func(x):
    for i in range(x):
        eval(f"from lib import function{i}")

    # All functions available in this scope

For extra safety, I recommend this be put into a try/catch.