问题

pkgName = 'f1'
fnName = 'fn1'
from pkgName import fnName

英文:

I have a function defined in file f1.py as:

def fn1():
 return 1

def fn2():
 return 2

For learning exercise I am trying the following, which works:

import f1
from f1 import fn1, fn2

But the following approach doesn't work:

pkgName = &#39;f1&#39;
fnName = &#39;fn1&#39;
from pkgName import fnName

How can I pass package name and function name as variable?

答案1

得分: 1

你可以使用__import__函数首先导入模块，然后通过getattr将函数作为模块对象的属性访问：

module_name = 'f1'
function_name = 'fn1'
fn = getattr(__import__(module_name, fromlist=[function_name]), function_name)
fn()

英文:

You can use the __import__ function to import the module first, and then access the function as an attribute of the module object with getattr:

module_name = &#39;f1&#39;
function_name = &#39;fn1&#39;
fn = getattr(__import__(module_name, fromlist=[function_name]), function_name)
fn()

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