我有一个带有函数名称的字符串变量，如何在Python中调用该函数？

Question

I have a string variable which comes with different function names, and I have a file which contains an often different set of functions which matchs the content of the string, how do I call that function in Python?

Example:

In File 1

def function1: ...
def function2: ...
def function3: ...

In File 2

functionname = "function2"

I need to call the function2 from the File1 from this file

Answer 1

myfunction = getattr(mymodule, functionname)
myfunction()

Answer 2

eval("function2")()

getattr(<module>, fname)()

Answer 3

name = 'function2'

assert re.match('^(?i)[_a-z][_a-z0-9]*$', name)

eval(name)()