How to use a variable of a IF Block statement in ELIF Block statement in python?

While running this code i am getting error "Local variable "Files" referenced before assignment". I am thinking the scope of variable Files is limited to the IF block. Any suggestions?

import shutil
import os
import logging
import time
import re
timestr = '_'+time.strftime("%Y%m%d-%H%M%S")    
logging.basicConfig(filename = 
"//p4products//nemis2//filehandlerU//ENSUBAPP_log//ENSUBAPP.log"+timestr, level = logging.INFO, 
format = '%(asctime)s:%(levelname)s:%(message)s')
src_dict = "//p4products/nemis2" 
pattern = re.compile ("Ena3s5npf_g") 

def Search_String_File(src_dict,pattern):
   for x in os.listdir(src_dict): 
    print(x)
    if os.path.isfile(os.path.join(src_dict, x)):
        files = os.path.join(src_dict,x)
        strng = open(files) 
        for lines in strng.readlines(): 
            try:
                if re.search(pattern, lines): 
                    print (re.split(r'=', lines))
            except Exception as e:
                    print(e)
                    pass
    elif x != "ENSUBAPP_search.py":
        return Search_String_File(files,pattern)

Search_String_File(src_dict,pattern)