How to append one function1 results to function2 results

[SriRajesh]

Hi, I have two functions and I want to append the results of function1 and function2.

#import difflib
import os
my_dir = 'D:\Backupdata\PythonCodes'
post_fix1 = ['\InputFiles\InputCSV1.csv','\InputFiles\InputCSV2.csv']
post_fix2 = ['\InputFiles\InputCSV1.csv','\InputFiles\InputCSV23.csv']

def myfun1(my_dir,post_fix1):
    result = ''
    for i in range (len(post_fix1)):
        #result = ''
        try:
            full_file = my_dir + str(post_fix1[i])
            #print(full_file)
            if (os.path.exists(full_file)) == True:
                print("File_existpostfix1")
                result = result + '0' + ','
                #print('file exist form postfix1')
            else:
                print('file does not exists')
                result = result + '1' +','
        except FileNotFoundError:
            result = result + '-1' + ','
            print('abormal')
    result = result.strip(',')
    print(result)
def my_fun2(my_dir,post_fix2):
    result1 = ''
    for i in range (len(post_fix1)):
        try:
            full_file = my_dir + str(post_fix2[i])
            if (os.path.exists(full_file)) == True:
                result1 = result1 + '0' + ','
                #print(full_file)
                print("File_existpostfix1",full_file)
            else:
                print('file does not exists2:', full_file)
                result1 = result1 + '1' + ','
        except FileNotFoundError:
            print('abormal2')
            result1 = result1 + '-1' + ','
    result1 = result1.strip(',')
    print(result1)
    
        
myfun1(my_dir,post_fix1)
my_fun2(my_dir,post_fix2)
#final_result = result1.append(result)
#

function1 results =[0,0]
function2 result = [0,1]
I want to final result = [0,0
0,1]