function - Assign line from .txt file to a variable python for later use -

i have 2 defined functions in both need use line text file found. because 2 different functions can't use "line" in 1 doesn't search text file line. want take value of "line" found , assign variable use in later functions error "variable_line" not defined.

section of first function:

while (len(code) == 8):     open('gtin products.txt', 'r') search:         line in search:             line = line.rstrip('\n')             if code in line:                 variable_line = line #this try assign contents variable                  print("your search found result: "+line) #this prints content of line                   add_cart() #second function defined below 

second function

def add_cart():     add_cart = ""     while add_cart not in ("y", "n"):         add_cart = input("would add item cart? ")         if add_cart == "y":             receipt_list.append(variable_line) #try use variable here error          if add_cart == "n":             break 

make add_cart accept argument:

def add_cart(variable_line): 

you can call this:

add_cart(variable_line) #second function defined below