Simple Python File I/O spell check program - python-3.x

Question

For a class I have to create a simple spell checking program that takes two files as inputs, one containing correctly spelled words and one containing a paragraph with a few misspelled words. I thought I had it figured out but I am getting an error I have never seen before. When the program finishes it gives the error:
<function check_words at 0x7f99ba6c60d0>
I have never seen this nor do I know what it means, any help in getting this program working would be appreciated. Program code is below:
import os
def main():
while True:
dpath = input("Please enter the path to your dictionary:")
fpath = input("Please enter the path to the file to spell check:")
d = os.path.isfile(dpath)
f = os.path.isfile(fpath)
if d == True and f == True:
check_words(dpath, fpath)
break
print("The following words were misspelled:")
print(check_words)
def linecheck(word, dlist):
if word in dlist:
return None
else:
return word
def check_words(dictionary, file_to_check):
d = dictionary
f = file_to_check
dlist = {}
wrong = []
with open(d, 'r') as c:
for line in c:
(key) = line.strip()
dlist[key] = ''
with open(f, 'r') as i:
for line in i:
line = line.strip()
fun = linecheck(line, dlist)
if fun is not None:
wrong.append(fun)
return wrong
if __name__ == '__main__':
main()

Answer 1

It's not an error, it's doing exactly what you are telling it to.
This line:
print(check_words)
You are telling it to print a function. The output you are seeing is just Python printing the name of the function and it's address: "printing the function".

Answer 2

Yes, don't do print(check_words), do print(check_words())
Furthermore, change check_words(dpath, fpath) to misspelled_words = check_words(dpath, fpath)
And change print(check_words) to print(misspelled_words)
Final code (with a few modifications):
import os
def main():
while True:
dpath = input("Please enter the path to your dictionary: ")
fpath = input("Please enter the path to the file to spell check: ")
d = os.path.isfile(dpath)
f = os.path.isfile(fpath)
if d == True and f == True:
misspelled_words = check_words(dpath, fpath)
break
print("\nThe following words were misspelled:\n----------")
#print(misspelled_words) #comment out this line if you are using the code below
#optional, if you want a better looking output
for word in misspelled_words: # erase these lines if you don't want to use them
print(word) # erase these lines if you don't want to use them
#------------------------
def linecheck(word, dlist):
if word in dlist:
return None
else:
return word
def check_words(dictionary, file_to_check):
d = dictionary
f = file_to_check
dlist = {}
wrong = []
with open(d, 'r') as c:
for line in c:
(key) = line.strip()
dlist[key] = ''
with open(f, 'r') as i:
for line in i:
line = line.strip()
fun = linecheck(line, dlist)
if fun is not None:
wrong.append(fun)
return wrong
if __name__ == '__main__':
main()