Alright, i have my reasons for this particular piece of code so dont worry its not for nothin (it just may seem useless because i modified it into a simpler version so that it can be helped with)

However, it doesn't work and the error I get is not referring to any lines in the script:

#test2.py
import re
import sys

x=1
while x==x:
  with open("room.txt", mode="a", encoding="utf-8") as log:
    log.seek(0)
    for line in log:
      if not re.search(("apple"), line):
        log.write("grape")
        log.write("\n")

assume this is the contents of room.txt just for clerification

cherry
orange
strawberry
lemmon

(there is an empty line after "lemmon" so that it writes starting with that new blank line)

an explination of the code's usage is probably necessary so ill just explain that part.

It's basically in a loop (the whole 6 lines, assume its an infinite loop) and if it cant find the word "apple" in any of the lines in the file then write "grape" onto the last new line (in this case the line after "lemmon").

I know that this code as it is will be quite useless but that's *only* because I had to modify it so that there wouldnt be any confusion over external definitions. The coding structure is the exact same.
The important part in this is fixing the error.

So when I run this code, I get this error:

Traceback (most recent call last):
  File "C:\Users\Jacob\Desktop\bot\test2.py", line 8, in <module>
    for line in log:
  File "C:\Python30\lib\io.py", line 1739, in __next__
    line = self.readline()
  File "C:\Python30\lib\io.py", line 1813, in readline
    while self._read_chunk():
  File "C:\Python30\lib\io.py", line 1560, in _read_chunk
    input_chunk = self.buffer.read1(self._CHUNK_SIZE)
AttributeError: 'BufferedWriter' object has no attribute 'read1'


A file opened in "a" mode can't be written to. Only r+ or a+ seem suitable for what you want to do.

Actually, a mode is appending, which is a form of writing.

However, files opened for a can't be read, only appended to. You need a+ to read and append. (The Python docs say that the modes with a plus sign at the end mean "updating," with is just a really unclear way to say "read and write.")

See http://stackoverflow.com/questions/1466000/python-open-built-in-function-difference-between-modes-a-a-w-w-and-r for more information.

Unfortunately it didnt work.. how am I able to search for a certain word in a line? For example if i have a line that says "I like dogs" and another line that says "I like cats", how am I able to search for the one that says "cats" vs the one that says "dogs"? What would be the search pattern in re.search? 

Finally got it working all I needed was f.readlines() instead of that for loop