Python从另一个文件调用函数-错误

Question

I am attempting to call a function from another file called 'run_ES_15M_Trend_Identifier':

import sys 
import os
sys.path.append(os.path.abspath(r"C:\Users\cost9\OneDrive\Documents\PYTHON\Daily Tasks\Individual Trading\ES"))


from ES_15M_Trend_Identifier import run_ES_15M_Trend_Identifier

So the above function comes from the ES_15M_Trend_Identifier py file. I just ran that file from its own directory and it works perfect - modifies the dataframe, sends to csv. So the error isn't coming from the function itself. Instead I get the error:

ImportError: cannot import name run_ES_15M_Trend_Identifier 

I realize there might be something circular about this process from other SO posts, but I'm not sure how to fix it.

edit: I've also tried:

from ES_15M_Trend_Identifier import *

run_ES_15M_Trend_Identifier()

which gives the error:

NameError: name 'run_ES_15M_Trend_Identifier' is not defined 

edit: Here's the function, which works when I run it in its own file:

def run_ES_15M_Trend_Identifier():
    # Do stuff to pandas dataframe, including some for loops that fill out additional columns - this function works on the original file    
    path_to_csv = "C:\\Users\\cost9\\OneDrive\\Documents\\PYTHON\\Daily Tasks\\Individual Trading\\ES\CSV\\15M\\Trend_Identifier\\ES_15M_Summary.csv"
    ES_15M_Summary_Reduced.to_csv(path_or_buf = path_to_csv)

Answer 1

Is both files are in the same directory? if not put both files in the same folder!