I have a python file containing multiple functions. And in another file, I have an array which contains functions name . *How can I implement array value in the format of functions *
For example : 1 file contains
def add(a,b) c = a+b return c 2nd file contains
functin_arry = ["add"] Then how can I call 1st file functions into 2nd file format of an array
You can make use of built-in function eval or just a reference to the function for accomplishing your task.
Using eval
Just define your function & supply your function name as parameter.
def add(x,y): return(x+y) eval("add")(2,3) Make sure that the argument to the eval function is a string. ie, supply your function name eval as a "string" followed by parameters.
Output would be: 5
Using function reference.
Define your function, add a reference to the function into a dictionary & invoke function from the via dict using it's key.
def add(x,y): return(x+y) dynFuncCalls={"add":add} #Reference your function to a dictionary. dynFunc["add"](2,3) #Call it. #Here also, the output would be: 5 Note: Avoid using eval, as it is a "dangerous function". It allows a user to execute a arbitrary code & it may compromise your entire system. So, just don't use it. It is a bad practice.
Use the function referencing, which I've mentioned in method 2. It is plain-simple & secure. (Make sure that you'll handle the KeyError exception).
You can define your first file to have all the functions, for example :
file_1.py
import numpy as np def func_a(a,b): res = a + b print("func_a, result : ", res) return res def func_b(a,b): res = np.sum(np.array((a,b))) print("func_b, result : ", res) return res To import them from another file, you'd use exec(open("file_1.py").read()) (see this answer) and you'd have the contents of the second file to be :
file_2.py
exec(open("file_1.py").read()) a = 1 b = 1 arr = [func_a,func_b] for i in arr: i(a,b) And then you can run file_2.py in a shell by :
(ipy3) sajid@DESKTOP-NDBN82B:/mnt/c/Users/sajid/Documents/misc/temp$ python file_2.py func_a, result : 2 func_b, result : 2 (ipy3) sajid@DESKTOP-NDBN82B:/mnt/c/Users/sajid/Documents/misc/temp$ 
arr = ['func_a','func_b'] when i apply this format it shows TypeError: 'str' object is not callable
arr=['func_a','func_b'] the contents of the array are strings (as they're nested within single quotes 'func_a' vs func_a). A string is not going to take any inputs as a function does and hence you have the error. On the other hand, if you use arr = [func_a,func_b] as I did, you're having the contents of the array be functions and not strings. They will thus accept inputs and run as per the function definition.